Data read October 27, 2026
OpenAI TTS APIs in 2026: 4 models, speed tier and languages
OpenAI has 4 models in the database. 0 of the 4 are in the multilingual speed ranking; the others are not tagged multilingual by Coval or are not measured by it.
Every measure is copied from a public benchmark with its source on the model page; a measure no benchmark holds is shown as n/a, never estimated.
How the rows are ordered. Ranked models first, in ranking order (speed tier, then P95, ties by median); the 4 models without a rank follow alphabetically.
| Rank | Model | Speed tier From the Coval P95 | P95 (ms) 1 turn in 20 is slower | Languages tested | Listener Elo Artificial Analysis, with 95% interval | Price per 1M characters List price; a range when sources differ |
|---|---|---|---|---|---|---|
| not ranked |  OpenAI GPT-4o mini TTS | n/a | n/a | 9 | n/a | $20 |
| not ranked |  OpenAI GPT-Realtime-2 | n/a | n/a | 0 | 1,073 ±12 | $191.60 |
| not ranked |  OpenAI TTS-1 | n/a | n/a | 0 | 1,088 ±10 | $15 |
| not ranked |  OpenAI TTS-1 HD | n/a | n/a | 0 | 1,106 ±11 | $30 |
Frequently asked questions
- Which OpenAI TTS model is fastest?
- No OpenAI model is in the multilingual speed ranking.
- How many OpenAI TTS models are covered?
- 4 models; 0 are ranked.