Cartesia vs OpenAI TTS on price
OpenAI TTS is cheaper at every volume from 1 to 100 hours of speech a month. At 10 hours a month, Cartesia's cheapest option is Pro at $33.60 and OpenAI TTS's is tts-1 at $8.10. Both sell an API.
| Speech a month | Cartesia | OpenAI TTS |
|---|---|---|
| 1 hour | $5 ($0.083/min) Pro | $0.81 ($0.013/min) tts-1 |
| 5 hours | $16.05 ($0.053/min) Pro | $4.05 ($0.013/min) tts-1 |
| 10 hours | $33.60 ($0.056/min) Pro | $8.10 ($0.013/min) tts-1 |
| 50 hours | $114 ($0.038/min) Startup | $40.50 ($0.013/min) tts-1 |
| 100 hours | $236 ($0.039/min) Startup | $81 ($0.013/min) tts-1 |
Each side's cheapest option for the volume, monthly billing where offered, free allowances included; bold marks the cheaper. Per-minute figures assume 900 characters of text per minute of speech.
What the numbers say
- How fast the speech is changes the bill for text-billed plans: at 10 hours a month, Cartesia costs $26.58 at 720 characters a minute and $37.50 at 1,000; OpenAI TTS $6.48 and $9.
Every Cartesia option at 10 hours a month
| Option | A month | Per minute |
|---|---|---|
| Pro | $33.60 | $0.056 |
| Startup | $49 | $0.082 |
| Scale | $299 | $0.498 |
Every OpenAI TTS option at 10 hours a month
| Option | A month | Per minute |
|---|---|---|
| tts-1 | $8.10 | $0.013 |
| tts-1-hd | $16.20 | $0.027 |
"Bigger plan" means the plan's minutes run out before 10 hours and no extra-minute price is published.
Price only: voices, languages, latency and licences differ, so try both. Compare every voice tool for your own monthly minutes, or see every text-to-speech API.
Prices on this page were checked against the official pricing pages on .