| Output $/MTok | $1.25 |
|---|---|
| Input $/MTok | $0.20 |
| Cached input $/MTok | $0.0200 |
| Context window | 400,000 |
| Output cap | 128,000 |
| Modalities | in: text, image / out: text |
| Tool use | ✓ |
| Structured output | ✓ |
| Family | GPT-5.4 |
| Knowledge cutoff | 2025-08-31 |
| Verified | 2026-07-02 |
| Source | provider page ↗ |
| $/min | $0.003300 |
|---|---|
| $/min batch | — |
| Streaming | — |
| Realtime | — |
| Languages | en |
| Diarization | included |
| TTFW | — |
| Verified | 2026-07-02 |
| Source | provider page ↗ |
| $/1M chars | $17.50 | $30.00 | $50.00 | $30.00 |
|---|---|---|---|---|
| Voice quality | neural | neural | neural | neural |
| Voice cloning | ✓ included | — | ✓ included | — |
| Voice count | 217 | — | — | 94 |
| Languages | en, hi, es, mr, kn, ta, bn, gu, te, ml, pa, or | en, es, de, fr, nl, it, ja | 43+ | en |
| SSML support | — | — | ✓ | — |
| TTFB | 200ms | — | — | 37ms |
| Output formats | pcm, mp3, wav, ulaw, alaw | wav, mp3, linear16, mulaw, alaw, opus | — | — |
| Verified | 2026-07-02 | 2026-07-02 | 2026-07-02 | 2026-07-02 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ | provider page ↗ |