OpenAI TTS / Realtime
OpenAI class A live
OpenAI's steerable TTS (gpt-4o-mini-tts, tts-1) and Realtime voice API; 11 preset voices, no user cloning, token/character pricing.
Layer 1 — factual axes
| API & price | public · tts-1 $15/1M chars; Realtime token-priced | secondary | source ↗ 2026-07-04 |
|---|---|---|---|
| Voices | 11 | official | source ↗ 2026-07-04 |
| Voice cloning | no | official | source ↗ 2026-07-04 |
| Languages | ~57 (Whisper set) | secondary | source ↗ 2026-07-04 |
| Weights | closed | official | source ↗ 2026-07-04 |
| Free tier | no | official | source ↗ 2026-07-04 |
Layer 2 — output quality
1100 / 1600
OpenAI’s steerable TTS (gpt-4o-mini-tts, tts-1) and Realtime voice API; 11 preset voices, no user cloning, token/character pricing.