OpenAI GPT-4o mini TTS | Cartesia Sonic 3.5 | |
|---|---|---|
| $/1M chars | $20.00 | $50.00 |
| Voice quality | neural | neural |
| Voice cloning | — | ✓ included |
| Voice count | — | — |
| Languages | en | 42+ |
| SSML support | — | ✓ |
| TTFB | — | 90ms |
| Output formats | — | raw/pcm_f32le, raw/pcm_s16le, raw/pcm_mulaw, raw/pcm_alaw, wav, mp3 |
| Verified | 2026-07-19 | 2026-07-27 |
| Source | provider page ↗ | provider page ↗ |