| Output $/MTok | $30.00 | $60.00 |
|---|---|---|
| Input $/MTok | $5.00 | $15.00 |
| Cached input $/MTok | $0.5000 | $7.5000 |
| Context window | 1,050,000 | 200,000 |
| Output cap | 128,000 | 100,000 |
| Modalities | in: text, image / out: text | in: text, image / out: text |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Family | GPT-5.5 | o-series |
| Knowledge cutoff | 2025-12-01 | 2023-10-01 |
| Verified | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ |
| $/1M chars | — | $50.00 | $30.00 | $19.50 |
|---|---|---|---|---|
| Voice quality | neural | neural | neural | neural |
| Voice cloning | ✓ included | ✓ included | — | — |
| Voice count | — | — | 94 | — |
| Languages | en | en, fr, de, es, pt, zh, ja, hi, ko | en | en, hi, mr, ta, ml, te, kn, pa, bn, or, gu, ar, zh, id, ja, ko, ms, tr, vi, de, es, fr, it, pt, ru, el, fi, no, pl |
| SSML support | — | — | — | — |
| TTFB | — | 40ms | 37ms | 200ms |
| Output formats | — | — | — | pcm, mp3, wav, ulaw, alaw |
| Verified | 2026-07-19 | 2026-07-19 | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ | provider page ↗ |