What an AI voice agent costs per minute
An AI voice agent costs from $0.0681 to $0.795 a minute of conversation on the 4 platforms that put a per-minute price on every part of a call, before the phone line: Vapi $0.0681 to $0.1313, Retell AI $0.0716 to $0.795, Deepgram Voice Agent API $0.075 to $0.163 and Bland $0.12 to $0.14. ElevenLabs Agents ($0.08), OpenAI GPT-Live ($0.05) and Twilio ConversationRelay ($0.07) charge a flat rate a minute and bill the language model by the token on top, and the OpenAI Realtime API bills everything in tokens.
Price your stack
Pick a platform, then its parts. Each platform opens on the vendor's own default picks where its page has a calculator (Vapi: Deepgram, OpenAI and ElevenLabs; Retell: GPT 5.5 with its own voices). The phone line opens on an inbound call to a Twilio US local number, at Twilio's price; set it to none for web or app calls.
1,000 minutes a month on Vapi: $81.87 to $129, or $0.0819 to $0.129 a minute on average.
| Part | Per minute | Per month |
|---|---|---|
| Vapi hosting | $0.05 | $50.00 |
| Transcriber (speech to text) Deepgram | $0.00953 to $0.00994 | $9.53 to $9.94 |
| Language model OpenAI | $0.00774 to $0.04523 | $7.74 to $45.23 |
| Voice (text to speech) ElevenLabs | $0.0146 to $0.02383 | $14.60 to $23.83 |
| Transport (phone line) Vapi Telephony / SIP | $0 | $0 |
| Success package No success package | – | $0 |
| Total | $0.0819 to $0.129 | $81.87 to $129 |
Vapi gives a per-minute range for each provider, so its totals are ranges too. Costs a vendor bills by the token with no per-minute price (the language model on ElevenLabs, GPT-Live and Twilio) count only once you enter your own figure. Phone number rental, extra concurrency and taxes are left out. How we compare the platforms: methodology.
How each platform splits the bill
Per minute of conversation, as each vendor's pricing page divides it:
| Platform | Platform fee | Billed on top | Phone line |
|---|---|---|---|
| Vapi | $0.05 | Transcriber $0.00521 to $0.01221; language model $0.006 to $0.04523; voice $0.00689 to $0.02383 | Free over Vapi telephony or SIP; other carriers at their own price, $0.0055 to $0.014 |
| Retell AI | $0.055 | Language model $0.0016 to $0.64; voice $0.015 to $0.10; add-ons $0.005 to $0.01 | $0.015 to $0.80 on Retell's numbers; no Retell charge with your own SIP trunk |
| Bland | $0.12 to $0.14 | Nothing: the language model, speech to text and text to speech are in the rate | Billed separately: your own carrier, or Bland's Twilio at pass-through cost (no rate given) |
| ElevenLabs Agents | $0.08 | Language model at token prices | No ElevenLabs fee; your carrier bills you (Twilio charges $0.0085 a minute inbound, $0.014 outbound) |
| Deepgram Voice Agent API | $0.075 to $0.163 | Nothing on the Standard and Advanced tiers; on the bring-your-own tiers, your own model or voice | Your carrier (Twilio charges $0.0085 a minute inbound, $0.014 outbound) |
| OpenAI GPT-Live | $0.05 | Backend model and tools at token prices | Your carrier (Twilio charges $0.0085 a minute inbound, $0.014 outbound) |
| OpenAI Realtime API | Billed in tokens | Audio in $10 to $32 and out $20 to $64 per million tokens | Your carrier (Twilio charges $0.0085 a minute inbound, $0.014 outbound) |
| Twilio ConversationRelay | $0.07 | Your language model at token prices | Your carrier (Twilio charges $0.0085 a minute inbound, $0.014 outbound) |
Cheapest and dearest per minute, and per month
| Platform | Cheapest picks | Dearest picks | 1,000 min a month | 10,000 min a month |
|---|---|---|---|---|
| Vapi | $0.0681 AssemblyAI, Google and Cartesia | $0.1313 OpenAI and ElevenLabs | $68.10 | $681 |
| Retell AI | $0.0716 GPT 5 nano and Retell Platform Voices | $0.795 GPT 6 Astra, fast tier and ElevenLabs v3 | $71.60 | $716 |
| Deepgram Voice Agent API | $0.075 the Standard tier | $0.163 the Advanced tier | $75.00 | $750 |
| Bland | $0.12 the Build plan | $0.14 the Start plan | $140 Start | $1,400 Start |
Per minute of conversation before the phone line, at each vendor's own prices: the platform fee with the cheapest, then the dearest, model and voice it lists, no add-ons. Monthly figures use the cheapest picks on the cheapest plan for that volume.
| Platform | Per minute | Billed on top |
|---|---|---|
| ElevenLabs Agents | $0.08 | Language model |
| OpenAI GPT-Live | $0.05 | Backend model and tools |
| OpenAI Realtime API | Tokens | Everything: audio and text tokens, with the conversation re-sent each turn |
| Twilio ConversationRelay | $0.07 | Your language model |
Bland's Build plan ($299 a month) lowers the rate from $0.14 to $0.12 a minute, so it pays for itself above 14,950 minutes a month.
Platform by platform
Vapi
A platform fee per minute, plus speech-to-text, the language model, text-to-speech and the phone line at each provider's own price.
- Vapi adds its $0.05-a-minute hosting fee to speech-to-text, the language model, text-to-speech and transport, each billed at the provider's listed price with no markup.
- Usage is prepaid. New accounts get $5 of free credit, one Vapi phone number and 4 concurrent calls.
- The Pro package costs 10% of the Vapi hosting fee, at least $999 a month; model costs don't count toward it.
- Add-ons: extra concurrent call lines cost $10 a month each, extra organizations $20 a month, and HIPAA-eligible data handling $2,000 a month.
- Vapi's own calculator puts 1,000 minutes a month with Deepgram, OpenAI and ElevenLabs over Vapi telephony at $82 to $129.
Vapi pricing, with the full price list and a calculator.
Retell AI
A per-minute voice infrastructure fee, plus a per-minute price for the language model and the voice you pick, and telephony if you use Retell's numbers.
- Retell bills each call to the second and adds the minutes up over the billing cycle, with no rounding up per call.
- Silence and hold time are billed, because speech recognition keeps listening for the whole call.
- After a transfer the AI agent fee stops; only telephony continues.
- Custom telephony (your own SIP trunk) carries no Retell telephony charge; Retell's own numbers cost $2.00 a month each plus the per-minute call rate.
- The first 20 concurrent calls are free; each further one costs $8.00 a month.
- Prompts over 4,000 tokens scale the billed duration: 4,800 tokens make a 60-second call bill as 72 seconds.
- New accounts get $10 of free credit.
- Retell's own estimator opens at $0.23 a minute: GPT 5.5 at $0.16, voice infra at $0.055 and its platform voices at $0.015.
Retell AI pricing, with the full price list and a calculator.
Bland
One per-minute rate that covers the language model, speech-to-text and text-to-speech; telephony is billed separately.
- The per-minute rate covers the language model, speech-to-text and text-to-speech, with no token charges.
- Telephony is billed separately: on your own carrier, or on Bland's built-in Twilio at pass-through cost. The pricing page gives no per-minute figure for Bland's numbers.
- Transfer time to a human costs $0.05 a minute on Start and $0.04 on Build when the call uses Bland's numbers; with your own Twilio number transfers are free.
- Call time is prorated to the exact second. An outbound call attempt on Bland's telephony costs at least $0.015.
- Bland's billing documentation also lists a Scale plan at $499 a month with $0.11 a minute, which its pricing page doesn't show.
Bland pricing, with the full price list and a calculator.
ElevenLabs Agents
A per-minute hosting rate that includes speech-to-text, text-to-speech and telephony, plus the language model at the provider's token price; your phone carrier bills you directly.
- Agents are billed by the call minute, not from the shared credit pool: $0.08 a minute beyond each plan's included minutes, with speech-to-text, text-to-speech and telephony included.
- The language model is billed on top at the provider's published token price, with no markup.
- ElevenLabs adds no telephony fee; if you connect Twilio or a SIP trunk, that provider bills you for the carrier side.
- Burst pricing lets agents go up to 3 times over the plan's concurrency limit, with the extra calls at $0.16 a minute, double the standard rate.
- Text messages cost $0.003 each.
- ElevenLabs' docs say periods of silence, when model inference is reduced, are billed at 5% of the usual per-minute rate.
ElevenLabs Agents pricing, with the full price list and a calculator.
Deepgram Voice Agent API
One per-minute rate for speech-to-text, the language model and text-to-speech, set by the model's tier; cheaper tiers if you bring your own model or voice. The phone line is yours.
- Billed on the length of the WebSocket connection; the rate includes speech-to-text, the language model and text-to-speech.
- Which tier a call bills at depends on the model: gpt-5.4-mini, claude-haiku-4-5 and gemini-3.5-flash are Standard; gpt-5.5, gpt-5.4 and claude-sonnet-4-6 are Advanced.
- Deepgram's Growth plan, prepaid credits from $4,000 a year, lowers Standard to $0.068 and Advanced to $0.146 a minute.
- Deepgram's table shows one price for Custom - BYO LLM, $0.059 a minute, while the same page's structured data gives $0.065 pay as you go and $0.059 on Growth; we leave that tier out.
- New accounts get $200 of free credit.
OpenAI GPT-Live
A per-minute voice session price; the backend model and tools that do the reasoning are billed separately at their token prices.
- GPT-Live voice sessions cost $0.05 a minute, billed per second without rounding up to a whole minute.
- The session bills while it is open: when either side speaks, when both are silent, and while the backend works.
- Creating a WebRTC session bills 15 seconds up front, credited against the session once it runs.
OpenAI Realtime API and GPT-Live pricing, with the full price list and a calculator.
OpenAI Realtime API
Billed in tokens: audio in and audio out at per-million-token prices, with the whole conversation sent again as input on every turn.
- Caller audio counts 1 token per 100 ms (600 a minute) and the agent's audio 1 token per 50 ms (1,200 a minute).
- The whole conversation is sent to the model again for each response, so later turns cost more; cached input is billed at the lower cached price.
- Input transcription, if you turn it on, is billed separately at the transcription model's price.
- There is no charge for bandwidth or connections.
- OpenAI suggests measuring a sample session's tokens in the Realtime Playground, because costs are hard to estimate ahead of time.
- With voice activity detection on, empty audio doesn't count as input tokens, so silence costs nothing by itself.
OpenAI Realtime API and GPT-Live pricing, with the full price list and a calculator.
Twilio ConversationRelay
A per-minute fee for speech-to-text and text-to-speech on a Twilio call, plus the call itself; you bring the language model.
- ConversationRelay costs $0.07 a minute on top of the call, with speech-to-text and text-to-speech included and your own language model.
- A US local number costs $1.15 a month and $0.0085 a minute to receive calls; a toll-free number $2.15 a month and $0.0220 a minute.
Left out
- Synthflow: Synthflow publishes no per-minute price: its pricing page lists enterprise contracts from $30,000 a year, scoped to call volume.
Quick answers
How much does an AI voice agent cost per minute?
From $0.0681 a minute (Vapi with its cheapest picks) to $0.795 on the platforms that price every part per minute, before the phone line. ElevenLabs Agents charges $0.08, OpenAI GPT-Live charges $0.05 and Twilio ConversationRelay charges $0.07 a minute plus the language model at token prices.
What is the cheapest AI voice agent platform?
On the vendors' own prices, Vapi: its $0.05 platform fee plus the cheapest speech-to-text, model and voice in its calculator come to $0.0681 a minute. Retell AI follows at $0.0716, then Deepgram Voice Agent API at $0.075 and Bland at $0.12. Model choice moves the price far more than the platform: the dearest picks cost $0.1313 on Vapi, $0.795 on Retell AI, $0.163 on Deepgram Voice Agent API and $0.14 on Bland.
How much does an AI phone agent cost a month?
At 1,000 minutes of calls a month with each platform's cheapest picks: $68.10 on Vapi, $71.60 on Retell AI, $75.00 on Deepgram Voice Agent API and $140 on Bland. Add the phone line: on a Twilio US local number, 1,000 inbound minutes cost $8.50 plus the number's rental.
Is the phone line included?
Rarely. Vapi lists its own telephony as free and passes other carriers through (Twilio $0.008 a minute inbound). Retell AI charges $0.015 a minute on its US numbers and nothing with your own SIP trunk. ElevenLabs adds no telephony fee, but your carrier bills you; Bland bills telephony separately.
Do AI voice agents charge for silence?
Mostly yes, because the line stays open. Retell AI bills the whole call, silence and hold time included; OpenAI's GPT-Live bills the session while both sides are silent; Deepgram bills the WebSocket connection time. ElevenLabs' documentation says periods of silence are billed at 5% of the usual per-minute rate.
How much does the OpenAI Realtime API cost per minute?
OpenAI prices it in tokens, not minutes. By its own count of audio tokens, a minute where the agent speaks half the time costs at least $0.048 on gpt-realtime-2, counting each second of audio once; every turn re-sends the conversation, so real calls cost more. Retell AI resells GPT Realtime 2 at $0.38 a minute.
Every platform in detail: Vapi pricing, Retell AI pricing, Bland pricing, ElevenLabs Agents pricing, OpenAI Realtime API pricing. The speech parts on their own: text-to-speech API pricing and speech-to-text API pricing.
Sources
Read on 7 October 2026:
- vapi.ai/pricing
- retellai.com/pricing
- docs.retellai.com/accounts/billing
- docs.retellai.com/accounts/billing-exceptions
- bland.ai/pricing
- docs.bland.ai/platform/billing
- elevenlabs.io/pricing/agents
- elevenlabs.io/pricing/api
- elevenlabs.io/docs/eleven-agents/customization/llm
- elevenlabs.io/docs/eleven-agents/customization/llm/optimizing-costs
- deepgram.com/pricing
- developers.deepgram.com/docs/voice-agent-llm-models
- developers.openai.com/api/docs/pricing.md
- developers.openai.com/api/docs/models/gpt-live-1.md
- developers.openai.com/api/docs/guides/realtime-costs.md
- twilio.com/en-us/voice/pricing/us
- twilio.com/en-us/products/conversational-ai/conversationrelay
- synthflow.ai/pricing
Show the quoted text
No Success Package Get started for free, and then pay only for the minutes that run $0 to start Pre-paid, $0.05/min Vapi hosting. Models pass-through at cost Start building $5 free credits to get you started 2 organizations 1 included Vapi phone number 4 concurrent calls
vapi.ai/pricing
Core For builders & early teams $29 / month Pre-paid, auto-renew Models pass-through at cost Contact Sales 2 organizations 5 included Vapi phone numbers 10 concurrent calls
vapi.ai/pricing
Pro For scaling teams in production 10% of Vapi hosting fee $999/mo minimum Models pass-through at cost Contact Sales 10 organizations 10 included Vapi phone numbers 30 concurrent calls
vapi.ai/pricing
Four components: speech-to-text, the language model, text-to-speech, and transport. Each is billed at the provider's listed price with no markup. Vapi's $0.05/min hosting fee is added on top.
vapi.ai/pricing. The answer to the page's question "What exactly is in the per-minute cost?", from the page's own data.
It's a percentage of your Vapi hosting fees, model costs are not included.
vapi.ai/pricing. The answer to the page's question "How is the Pro package price calculated?", from the page's own data.
Transcriber Deepgram $0.0095 - $0.0099/min Intelligence Model OpenAI $0.0077 - $0.0452/min Voice ElevenLabs $0.0146 - $0.0238/min
vapi.ai/pricing. The calculator's default picks.
{"id":"transcriber","label":"Transcriber","providers":[{"value":"deepgram","label":"Deepgram","priceLow":0.00953,"priceHigh":0.00994},{"value":"assemblyai","label":"AssemblyAI","priceLow":0.00521,"priceHigh":0.00747},{"value":"openai","label":"OpenAI","priceLow":0.0118,"priceHigh":0.01221}]
vapi.ai/pricing. The calculator's own data: the per-minute range it shows for each transcriber.
{"id":"model","label":"Intelligence Model","providers":[{"value":"openai","label":"OpenAI","priceLow":0.00774,"priceHigh":0.04523},{"value":"anthropic","label":"Anthropic","priceLow":0.00818,"priceHigh":0.03656},{"value":"google","label":"Google","priceLow":0.006,"priceHigh":0.03329}]
vapi.ai/pricing. The calculator's own data: the per-minute range it shows for each model provider.
{"id":"voice","label":"Voice","providers":[{"value":"elevenlabs","label":"ElevenLabs","priceLow":0.0146,"priceHigh":0.02383},{"value":"vapi","label":"Vapi","priceLow":0.00695,"priceHigh":0.01934},{"value":"cartesia","label":"Cartesia","priceLow":0.00689,"priceHigh":0.01294}]
vapi.ai/pricing. The calculator's own data: the per-minute range it shows for each voice provider.
Transport Fee Network and data transport services (Charged by provider, not Vapi) Vapi Telephony / SIP Vapi Telephony / SIP Free Vapi WebSockets Free Daily WebRTC Free Twilio Inbound $0.008 / min Twilio Outbound $0.014 / min Vonage $0.00814 / min Telnyx $0.0055 / min
vapi.ai/pricing
Your Estimate Hosting Fee 1,000 minutes $50 Transcriber Deepgram $10 Intelligence Model OpenAI $8 - $45 Voice ElevenLabs $15 - $24 Transport Fee Vapi Telephony / SIP $0 Success Package No Success Package $0 Estimated Total $ 82 – $ 129 /mo
vapi.ai/pricing
HIPAA compliance HIPAA eligible data handling. Standard Data Processing Agreement and Business Associate Agreement $2,000 / month Additional concurrency Extra concurrent call lines beyond your package default $10 / line / month Additional organizations Extra workspaces beyond your package default $20 / organization / month
vapi.ai/pricing
Pay as you go Go live in minutes with $10 in free credits. Full platform access, no commitments. Just build, test, and pay as you scale. $0.07-$0.31 / min for AI Voice Agents
retellai.com/pricing
Cost Per Minute $ 0.230 LLM Cost $ 0.160 /min Retell Voice Infra $ 0.055 /min TTS Cost $ 0.015 /min Telephony Cost $ 0.000 /min Add-ons $ 0.000 /min
retellai.com/pricing. The page's cost estimator as it opens in a browser, with GPT 5.5 and Retell's platform voices picked (read in plain headless Chromium; the static HTML holds a placeholder of $0.11 until the script runs).
Conversation Voice Engine Notes Pricing Retell Voice Infra $0.055/minute
retellai.com/pricing
Text-to-speech Notes Pricing Retell Platform Voices $0.015/minute Minimax Voices $0.015/minute Fish Voices $0.015/minute ElevenLabs Flash $0.040/minute ElevenLabs Multilingual v2 $0.06/minute ElevenLabs v3 $0.10/minute ElevenLabs v3 Conversational $0.08/minute ElevenLabs v4 $0.10/minute ElevenLabs v4 Turbo $0.08/minute Cartesia Voices $0.015/minute OpenAI Voices $0.015/minute Inworld Voices $0.015/minute
retellai.com/pricing
LLM Standard Fast Tier GPT 5.6 Terra Recommended $0.064/minute Claude 5 Sonnet Recommended $0.064/minute GPT 5.5 Recommended $0.16/minute $0.32/minute GPT 5.4 Recommended $0.080/minute $0.16/minute GPT 6.1 Sol $0.064/minute $0.128/minute GPT 6 Astra $0.32/minute $0.64/minute GPT 6 Sol $0.064/minute $0.128/minute GPT 6 Luna $0.0032/minute $0.0064/minute GPT 5.6 Sol $0.128/minute $0.256/minute GPT 5.6 Luna $0.0064/minute GPT 5.4 mini $0.024/minute $0.048/minute GPT 5.4 nano $0.0064/minute GPT 5.2 $0.056/minute $0.112/minute GPT 5.1 $0.04/minute $0.08/minute GPT 5 $0.04/minute $0.08/minute GPT 5 mini $0.008/minute $0.016/minute GPT 5 nano $0.0016/minute GPT 4.1 $0.045/minute $0.0675/minute GPT 4.1 mini $0.0128/minute $0.0192/minute GPT 4.1 nano $0.0032/minute $0.0048/minute Claude 5.5 Opus $0.128/minute Claude 5.5 Sonnet $0.064/minute Claude 5 Opus $0.16/minute Claude 4.6 sonnet $0.08/minute Claude 4.5 haiku $0.025/minute Claude 4.5 sonnet $0.08/minute Gemini 3.8 Flash $0.048/minute Gemini 3.7 Flash $0.048/minute Gemini 3.6 Flash $0.024/minute Gemini 3.5 Flash Lite $0.0096/minute Gemini 3.5 Flash $0.048/minute Gemini 3.1 Flash Lite $0.008/minute Gemini 3.0 Flash $0.016/minute
retellai.com/pricing. The table's columns are Standard, then Fast Tier; a model with one price has an empty Fast Tier cell.
Telephony Pricing Call Rates No Charge for Sip Trunking/Custom Telephony Select Country Country United States (Twilio) United States (Twilio Toll Free) India (Twilio) Australia (Twilio) Germany (Twilio) Spain (Twilio) United Kingdom (Twilio) Mexico (Twilio) France (Twilio) Japan (Twilio) Canada (Twilio) Italy (Twilio) Indonesia (Twilio) Philippines (Twilio) Malaysia (Twilio) Thailand (Twilio) United States (Telnyx) India(Telnyx) Canada(Telnyx) $ 0.015 /min
retellai.com/pricing
<option value="0.015" class="option">United States (Twilio)</option><option value="0.06" class="option">United States (Twilio Toll Free)</option><option value="0.15" class="option">India (Twilio)</option><option value="0.1" class="option">Australia (Twilio)</option><option value="0.1" class="option">Germany (Twilio)</option><option value="0.1" class="option">Spain (Twilio)</option><option value="0.1" class="option">United Kingdom (Twilio)</option><option value="0.05" class="option">Mexico (Twilio)</option><option value="0.06" class="option">France (Twilio)</option><option value="0.28" class="option">Japan (Twilio)</option><option value="0.03" class="option">Canada (Twilio)</option><option value="0.06" class="option">Italy (Twilio)</option><option value="0.4" class="option">Indonesia (Twilio)</option><option value="0.8" class="option">Philippines (Twilio)</option><option value="0.2" class="option">Malaysia (Twilio)</option><option value="0.45" class="option">Thailand (Twilio)</option><option value="0.03" class="option">United States (Telnyx)</option><option value="0.25" class="option">India(Telnyx)</option><option value="0.03" class="option">Canada(Telnyx)</option>
retellai.com/pricing. The page's country menu in its own markup; each value is the per-minute rate the page shows when that country is picked.
Call Agent Add-ons Notes Extras Knowledge Base +$0.005/minute Batch Call +$0.005/dial Branded Call +$0.10/outbound call Advanced Denoising +$0.005/min Safety Guardrails +$0.005/min PII Removal +$0.01/min AI Quality Assurance First 100 minutes free $0.10/min SMS $0.01/Msg
retellai.com/pricing
Monthly Subscription Items Notes Pricing Retell Phone Numbers No Charge for custom phone numbers $2.00/month Retell SMS No charge for custom telephony SMS $20.00/month Concurrency (Active Calls) Free for first 20 concurrency (active calls) $8.00/Concurrency/month Knowledge Base $80/month free value (10 KBs) $8.00/Knowledge Base/month (prorated) Verified Phone Number $10.00/Phone number/month
retellai.com/pricing
Speech-to-speech LLM Notes Pricing GPT Realtime 1.5 $0.345/minute GPT Realtime $0.345/minute GPT Realtime mini $0.07/minute GPT Realtime 2.1 $0.38/minute GPT Realtime 2 $0.38/minute GPT Realtime 2.1 mini $0.07/minute
retellai.com/pricing
How do you calculate the minutes? Each call is tracked to the nearest second. At the end of each billing cycle, we charge based on your total accumulated minutes. No rounding up per call, no inflated bills. Does billing continue after a transfer? Once the call is transferred, the AI voice agent fee stops. Only the telephony fee continues for the remainder of the transferred call. Am I charged during silence or hold time? Yes. Billing covers the entire duration of the call because the speech-to-text engine remains active and listening throughout, even during silence.
retellai.com/pricing
Voice infra : Retell’s conversation voice engine. This is the flat per-minute platform cost of running the real-time call, separate from LLM and telephony costs. LLM : the per-minute cost of the language model your agent uses, which varies by model. Telephony : per-minute call rates and monthly phone number fees for Retell-provided numbers. Custom telephony (SIP trunking) carries no Retell telephony charge.
docs.retellai.com/accounts/billing
Rule 2: LLM Price Scaling for > 4,000 Token Prompt Length When it applies: Agents that use more than 4,000 LLM tokens in their prompts Billing adjustment: Duration is scaled proportionally based on token usage
docs.retellai.com/accounts/billing-exceptions
Scaling Factor = Prompt LLM Tokens ÷ 4,000 Billed Duration = Original Duration × Scaling Factor (rounded up) Example: Call duration: 60 seconds LLM tokens used: 4,800 Scaling factor: 4,800 ÷ 4,000 = 1.2 Billed duration: 72 seconds (12 seconds additional charge)
docs.retellai.com/accounts/billing-exceptions
FOR DEVELOPERS Start 2 credits + an inbound number ($15/mo value). $0.14 /min $0 platform fee. No card required. Start building $0.05/transfer min 10 concurrent calls 100 calls/day 10 knowledge bases FOR TEAMS Build Lower per-minute rates. Higher rate limits. $0.12 /min $299/month platform fee Start building $0.04/transfer min 50 concurrent calls 2,000 calls/day 50 knowledge bases
bland.ai/pricing
Included in your per-minute rate LLM No token charges STT Real-time transcription TTS Premium voices
bland.ai/pricing
Clear pricing across every call No token charges. No model-provider pass-throughs. No surprise bills.
bland.ai/pricing
Bland's per-minute rate covers the LLM, STT, and TTS in one number, with no token charges and no model-provider pass-throughs. Telephony is billed separately, on your own carrier or Bland's at pass-through cost.
bland.ai/pricing
Yes. Bland integrates with your existing Twilio account, with SIP trunks from any contact-center or telephony provider, or you can use Bland's built-in Twilio at pass-through cost. BYOT customers do not pay transfer fees. You handle carrier costs directly and Bland charges only the per-minute AI rate.
bland.ai/pricing
New Pricing Structure (Effective December 5th, 2025) Plan Price Connected Minute Rate Transfer Time Rate Start Free $0.14 / min $0.05 / min Build $299 $0.12 / min $0.04 / min Scale $499 $0.11 / min $0.03 / min
docs.bland.ai/platform/billing
Call Time Prorated to the exact second. Only active call time is counted. Per minute rate based on plan
docs.bland.ai/platform/billing
Outbound Minimum Minimum charge per outbound call attempt using Bland’s telephony. $0.015 / call
docs.bland.ai/platform/billing
Connected time is the full AI conversation duration of the call. Transfer time is billed additionally when the call is transferred to a human using Bland-provided numbers. BYOT (Bring Your Own Twilio) customers do not pay transfer fees.
docs.bland.ai/platform/billing
Free $0 per month Build for free 15 minutes of calls included 4 Concurrent Calls Workflow Builder Knowledge Base Multilingual Widget Starter Until Oct 18 $6 First month 83% off $1 per month Choose Starter Everything in free, plus 75 minutes of calls included 6 Concurrent Calls Text messages Commercial License Creator Popular $22 First month 50% off $11 per month Choose Creator Everything in Starter, plus 275 minutes of calls included 10 Concurrent Calls Additional Minutes Pro $99 per month Choose Pro Everything in Creator, plus 1,238 minutes of calls included 20 Concurrent Calls For Businesses Scale $299 per month Choose Scale Everything in Pro, plus 3,738 minutes of calls included 30 Concurrent Calls 3 Workspace Seats Business $990 per month Choose Business Everything in Scale, plus 12,375 minutes of calls included 40 Concurrent Calls
elevenlabs.io/pricing/agents
Starter $6 per month , first month $1 Creator $22 per month , first month $11 Pro $99 per month Scale $299 per month Business $990 per month ElevenLabs Hosting Included Call (per minute) Additional Call (per minute) Text message (per message) Burst pricing (per minute) Concurrent Calls 15 min $0.080 $0.003 $0.160 4 75 min $0.080 $0.003 $0.160 6 275 min $0.080 $0.003 $0.160 10 1,238 min $0.080 $0.003 $0.160 20 3,738 min $0.080 $0.003 $0.160 30 12,375 min $0.080 $0.003 $0.160 40 External Providers LLM Telephony Provider Based on usage and varies by model. At cost
elevenlabs.io/pricing/agents. The "ElevenAgents pricing" table; its columns run Free / Pay as you go, Starter, Creator, Pro, Scale, Business.
ElevenAgents plans are billed by call minutes, not by the shared credit pool. Included call minutes and concurrent calls per plan: Free 15 minutes / 4 concurrent calls; Starter 75 minutes / 6; Creator 275 minutes / 10; Pro 1,238 minutes / 20; Scale 3,738 minutes / 30; Business 12,375 minutes / 40. Additional call minutes cost $0.08 per minute (burst pricing $0.16 per minute, double the standard rate, when you exceed your concurrency limit), and text messages cost $0.003 each. LLM usage is billed separately on top, based on the model you choose. ElevenLabs does not charge extra for telephony, but if you connect an external provider such as Twilio or a SIP trunk, that provider bills you directly for its own charges.
elevenlabs.io/pricing/agents
No. Telephony is included on every plan, and phone calls are billed at the same call-minute rate as any other channel, so ElevenLabs adds no telephony fee. You connect your own provider, such as Twilio or a SIP trunk, and that provider bills you directly for the carrier side of the call at whatever rate you have with them.
elevenlabs.io/pricing/agents
Included Features Text to Speech Speech to Text Knowledge Bases RAG Telephony
elevenlabs.io/pricing/agents
Burst pricing allows your ElevenLabs agents to temporarily exceed your workspace's subscription concurrency limit during high-demand periods. When enabled, your agents can handle up to 3 times your normal concurrency limit, with excess calls charged at double the standard rate.
elevenlabs.io/pricing/agents
Speech Engine Agents $0.08 Price per minute
elevenlabs.io/pricing/api
Pass-through pricing : ElevenLabs passes through third-party LLM costs at the provider’s published rate, with no markup.
elevenlabs.io/docs/eleven-agents/customization/llm
ElevenLabs supports reducing costs by reducing inference of the models during periods of silence. These periods are billed at 5% of the usual per minute rate.
elevenlabs.io/docs/eleven-agents/customization/llm/optimizing-costs
Tier Pay As You Go Growth Standard $0.075/min i calculated based on websocket connection time. $0.068/min i calculated based on websocket connection time. Standard - BYO TTS $0.065/min i calculated based on websocket connection time. $0.051/min i calculated based on websocket connection time. Custom - BYO LLM $0.059/min i calculated based on websocket connection time. Custom - BYO LLM + TTS $0.050/min i calculated based on websocket connection time. $0.041/min i calculated based on websocket connection time. Advanced $0.163/min i calculated based on websocket connection time. $0.146/min i calculated based on websocket connection time. Advanced - BYO TTS $0.122/min i calculated based on websocket connection time. $0.110/min i calculated based on websocket connection time.
deepgram.com/pricing. The Voice Agent API table: Pay As You Go, then Growth (prepaid credits, from $4,000 a year).
"name":"Deepgram Voice AI Platform Pricing - Custom - BYO LLM - Pay As You Go","price":"0.065"
deepgram.com/pricing. The page's structured data. Its table shows a single price, $0.059, on this row.
The Voice Agent API is billed based on the duration of the conversation. It includes the orchestration of Speech-to-Text (listening), LLM processing (thinking), and Text-to-Speech (speaking). If you "Bring Your Own" LLM (e.g., GPT-4), you only pay Deepgram for the audio components and orchestration, often resulting in lower costs.
deepgram.com/pricing. The answer to the page's question "How does pricing work for the Voice Agent API?", from the page's own data.
Free $200 Credit then pay-as-you-go
deepgram.com/pricing
Growth Save up to 20% With pre-paid credits for the year. Credits are redeemed against actual usage. Overview Price Free $200 Credit then pay-as-you-go $4K+ / year
deepgram.com/pricing
open_ai gpt-5.5 Advanced open_ai gpt-5.4-nano Standard open_ai gpt-5.4-mini Standard open_ai gpt-5.4 Advanced
developers.deepgram.com/docs/voice-agent-llm-models
anthropic claude-sonnet-4-6 Advanced anthropic claude-sonnet-4-5 Advanced anthropic claude-haiku-4-5 Standard
developers.deepgram.com/docs/voice-agent-llm-models
google gemini-3.5-flash Standard google gemini-3.1-flash-lite Standard
developers.deepgram.com/docs/voice-agent-llm-models
[GPT-Live 1](https://developers.openai.com/api/docs/models/gpt-live-1) voice sessions are billed per second, without rounding up to a whole minute. Backend model and tool usage is charged separately. ### Pricing Table data | Model | Price per minute | | --- | --- | | gpt-live-1 | $0.05 |
developers.openai.com/api/docs/pricing.md
Voice sessions cost $0.05 per minute, billed per second. Backend model and tool usage is billed separately.
developers.openai.com/api/docs/models/gpt-live-1.md
Active session time includes time when the user speaks, the assistant speaks, both are silent, or the backend is working.
developers.openai.com/api/docs/guides/realtime-costs.md
A `POST /v1/live/sessions` request to create a WebRTC session bills 15 seconds of voice duration while the session initializes. That amount is credited against duration charges once the session starts running.
developers.openai.com/api/docs/guides/realtime-costs.md
Realtime and audio generation models Prices per 1M tokens unless noted. ### Grouped Pricing Table data | Model | Modality | Input | Cached input | Output / cost |
developers.openai.com/api/docs/pricing.md
| gpt-realtime-2.1 | Audio | $32.00 | $0.40 | $64.00 | | gpt-realtime-2.1 | Text | $4.00 | $0.40 | $24.00 | | gpt-realtime-2.1 | Image | $5.00 | $0.50 | - | | gpt-realtime-2.1-mini | Audio | $10.00 | $0.30 | $20.00 | | gpt-realtime-2.1-mini | Text | $0.60 | $0.06 | $2.40 | | gpt-realtime-2.1-mini | Image | $0.80 | $0.08 | - | | gpt-realtime-2 | Audio | $32.00 | $0.40 | $64.00 | | gpt-realtime-2 | Text | $4.00 | $0.40 | $24.00 | | gpt-realtime-2 | Image | $5.00 | $0.50 | - | | gpt-realtime-1.5 | Audio | $32.00 | $0.40 | $64.00 | | gpt-realtime-1.5 | Text | $4.00 | $0.40 | $16.00 | | gpt-realtime-1.5 | Image | $5.00 | $0.50 | - | | gpt-realtime-mini | Audio | $10.00 | $0.30 | $20.00 | | gpt-realtime-mini | Text | $0.60 | $0.06 | $2.40 | | gpt-realtime-mini | Image | $0.80 | $0.08 | - | | gpt-realtime | Audio | $32.00 | $0.40 | $64.00 | | gpt-realtime | Text | $4.00 | $0.40 | $16.00 | | gpt-realtime | Image | $5.00 | $0.50 | - |
developers.openai.com/api/docs/pricing.md. The realtime models' rows of the table: model, modality, then input, cached input and output prices per million tokens.
Audio tokens in user messages are 1 token per 100 ms of audio, while audio tokens in assistant messages are 1 token per 50ms of audio.
developers.openai.com/api/docs/guides/realtime-costs.md
The entire conversation is sent to the model for each Response. The output from a turn will be added as Items to the server Conversation and become the input to subsequent turns, thus turns later in the session will be more expensive.
developers.openai.com/api/docs/guides/realtime-costs.md
A Response can be created manually or automatically if voice activity detection (VAD) is turned on. VAD will effectively filter out empty input audio, so empty audio doesn't count as input tokens unless the client manually adds it as conversation input.
developers.openai.com/api/docs/guides/realtime-costs.md
Given the complexity in Realtime API token usage it can be difficult to estimate your costs ahead of time. A good approach is to use the Realtime Playground with your intended prompts and functions, and measure the token usage over a sample session.
developers.openai.com/api/docs/guides/realtime-costs.md
There is no cost currently for network bandwidth or connections.
developers.openai.com/api/docs/guides/realtime-costs.md
Aside from conversational Responses, the Realtime API bills for input transcriptions, if enabled.
developers.openai.com/api/docs/guides/realtime-costs.md
Number type To make calls To receive calls Refer from Twilio Local calls $0.0140 / min $0.0085 / min Toll-free calls $0.0140 / min $0.0220 / min Browser/app $0.0040 / min $0.0040 / min SIP interface $0.0040 / min $0.0040 / min
twilio.com/en-us/voice/pricing/us
Receive calls Number type Price Local numbers $0.0085 / min + $1.15 / mo Toll-free numbers $0.0220 / min + $2.15 / mo
twilio.com/en-us/voice/pricing/us
Media Streams $0.0044 / min SIPREC $0.0044 / min Conversation Relay $0.07 / min
twilio.com/en-us/voice/pricing/us
Pricing current as of August 2026
twilio.com/en-us/voice/pricing/us
Yes. Twilio Conversation Relay is built for bring-your-own-LLM, so you control the UX, the costs, and can adopt new models as they ship. You get natural human-sounding TTS and real-time STT out of the box. Or, you can bring your own text-to-speech for a fully custom voice.
twilio.com/en-us/products/conversational-ai/conversationrelay
Enterprise contracts start at $30,000 annually. Final pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs, and launch support.
synthflow.ai/pricing
Prices on this page were checked against the official pricing pages on .