| Output $/MTok | $15.00 | $1.00 | $0.40 | $6.00 |
|---|---|---|---|---|
| Input $/MTok | $2.50 | $1.00 | $0.05 | $2.00 |
| Cached input $/MTok | $0.2500 | — | $0.0050 | $0.3000 |
| Context window | 1,050,000 | 128,000 | 400,000 | 500,000 |
| Output cap | 128,000 | 8,000 | 128,000 | 500,000 |
| Modalities | in: text, image / out: text | in: text / out: text | in: text, image / out: text | in: text, image / out: text |
| Tool use | ✓ | — | ✓ | ✓ |
| Structured output | ✓ | ✓ | ✓ | ✓ |
| Family | GPT-5.4 | Sonar | GPT-5 | Grok 4 |
| Knowledge cutoff | 2025-08-31 | — | 2024-05-31 | 2026-02-01 |
| Verified | 2026-07-19 | 2026-07-19 | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ | provider page ↗ | provider page ↗ |
| $/1M chars | $50.00 | $30.00 |
|---|---|---|
| Voice quality | neural | neural |
| Voice cloning | ✓ included | — |
| Voice count | — | 94 |
| Languages | 31+ | en |
| SSML support | — | — |
| TTFB | — | 37ms |
| Output formats | — | — |
| Verified | 2026-07-19 | 2026-07-19 |
| Source | provider page ↗ | provider page ↗ |