| Output $/MTok | $8.00 | $14.00 |
|---|---|---|
| Input $/MTok | $2.00 | $1.75 |
| Cached input $/MTok | $0.5000 | $0.1750 |
| Context window | 200,000 | 400,000 |
| Output cap | 100,000 | 128,000 |
| Modalities | in: text, image / out: text | in: text, image / out: text |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Family | o-series | Codex |
| Knowledge cutoff | 2024-06-01 | 2025-08-31 |
| Verified | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ |
| $/1M chars | $30.00 | $50.00 | $30.00 | $50.00 |
|---|---|---|---|---|
| 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, es, de, fr, nl, it, ja | en, fr, de, es, pt, zh, ja, ko |
| SSML support | — | — | — | — |
| TTFB | 37ms | 40ms | — | 90ms |
| Output formats | — | — | wav, mp3, linear16, mulaw, alaw, opus | — |
| Verified | 2026-07-19 | 2026-07-19 | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ | provider page ↗ |