| Output $/MTok | $15.00 | $1.00 |
|---|---|---|
| Input $/MTok | $2.50 | $1.00 |
| Cached input $/MTok | $0.2500 | — |
| Context window | 1,050,000 | 128,000 |
| Output cap | 128,000 | 8,000 |
| Modalities | in: text, image / out: text | in: text / out: text |
| Tool use | ✓ | — |
| Structured output | ✓ | ✓ |
| Family | GPT-5.4 | Sonar |
| Knowledge cutoff | 2025-08-31 | — |
| Verified | 2026-07-02 | 2026-07-02 |
| Source | provider page ↗ | provider page ↗ |
| $/1M chars | $50.00 | $50.00 | $30.00 | $17.50 |
|---|---|---|---|---|
| Voice quality | neural | neural | neural | neural |
| Voice cloning | ✓ included | ✓ included | — | ✓ included |
| Voice count | — | — | 94 | 217 |
| Languages | English | en, fr, de, es, pt, zh, ja, ko | en | en, hi, es, mr, kn, ta, bn, gu, te, ml, pa, or |
| SSML support | — | — | — | — |
| TTFB | 75ms | 90ms | 37ms | 200ms |
| Output formats | — | — | — | pcm, mp3, wav, ulaw, alaw |
| Verified | 2026-07-02 | 2026-07-02 | 2026-07-02 | 2026-07-02 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ | provider page ↗ |