| Output $/MTok | $8.00 | $1.25 | $6.00 |
|---|---|---|---|
| Input $/MTok | $2.00 | $0.20 | $2.00 |
| Cached input $/MTok | $0.5000 | $0.0200 | $0.3000 |
| Context window | 200,000 | 400,000 | 500,000 |
| Output cap | 100,000 | 128,000 | 500,000 |
| Modalities | in: text, image / out: text | in: text, image / out: text | in: text, image / out: text |
| Tool use | ✓ | ✓ | ✓ |
| Structured output | ✓ | ✓ | ✓ |
| Family | o-series | GPT-5.4 | Grok 4 |
| Knowledge cutoff | 2024-06-01 | 2025-08-31 | 2026-02-01 |
| Verified | 2026-07-19 | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ |
| $/1M chars | $50.00 | $15.00 | $50.00 |
|---|---|---|---|
| Voice quality | neural | neural | neural |
| Voice cloning | ✓ included | — | ✓ included |
| Voice count | — | — | — |
| Languages | 31+ | en | 42+ |
| SSML support | — | — | ✓ |
| TTFB | — | — | — |
| Output formats | — | — | — |
| Verified | 2026-07-19 | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ |