Best cell per row highlighted. Null means undisclosed — never counted as zero.
| Provider | xAI | xAI |
| Family / tier | Grok 4 · Reasoning | Grok 4 · Flagship |
| Status | GA | GA |
| Released | 2026-03-10 | 2026-09-21 |
| Knowledge cutoff | 2024-11 | 2026-05 |
| Context window | 1M | 500K |
| Max output tokens | — | — |
| Input modalities | text, image | text, image |
| Reasoning mode | optional | always |
| Open weights | No | No |
| Input | $1.25 | $2 |
| Output | $2.5 | $6 |
| Cached input | $0.2 | $0.5 |
| Batch input | $1 | — |
| Free tier | Yes | Yes |
| Output speed (tok/s) | 171.4 | — |
| Time to first token (s) | 13.24 | — |
| Latency tier | medium | medium |
| Trains on inputs | No | No |
| License | Proprietary | Proprietary |
| Clouds | — | — |
| Compliance | SOC2 | SOC2 |
| Unified score | 6.9 | 8.2 |
| Decision Maker | 7 | 8 |
| Domain Strategist | 6.5 | 8.5 |
| Finance Lead | 6.5 | 9 |
| Domain Practitioner | 7.5 | 8.5 |
| Power User | 6.5 | 8 |
| Skeptic | 6 | 7 |
| Value score | 7 | 8.8 |