Provider · read on October 27, 2026
OpenAI text-to-speech models, ranked by speed
4 of the 96 text-to-speech (TTS) models in this index are filed under OpenAI , led by OpenAI TTS-1 HD, OpenAI TTS-1 and OpenAI GPT-Realtime-2. Same order and same measures as the full ranking.
| Rank | Model | Speed tier | P95 | Speed (shorter is faster) | Median | Listener Elo | Price per 1M chars | Best for |
|---|---|---|---|---|---|---|---|---|
| 49 (tie) |  OpenAI TTS-1 HDOpenAI | No tier | Not timed | Not timed | Not timed | 1,106 | $30 | Customer service, Assistants, Entertainment, Knowledge sharing |
| 52 (tie) |  OpenAI TTS-1OpenAI | No tier | Not timed | Not timed | Not timed | 1,088 | $15 | Customer service, Assistants, Entertainment, Knowledge sharing |
| 55 |  OpenAI GPT-Realtime-2OpenAI | No tier | Not timed | Not timed | Not timed | 1,073 | $191.6 | Customer service, Assistants, Entertainment, Knowledge sharing |
| Unranked |  OpenAI GPT-4o mini TTSOpenAI | No tier | Not timed | Not timed | Not timed | Not rated | $20 | Not rated |
Frequently asked questions
- Which OpenAI TTS model is the fastest?
- None of the 4 models on this page is timed by Coval, so no speed comparison is made. They are ordered by listener Elo from Artificial Analysis where it is published.
- How are these models ordered?
- As in the full ranking: speed tier, then P95 time to first audio, with ties within 10 ms ordered by median time to first audio. Models Coval does not time follow, ordered by listener Elo; models with neither measure come last, in alphabetical order.