xai/grok-4-fast-reasoning| Provider | Input, $ per 1M | Output, $ per 1M | In our data since |
|---|---|---|---|
| Jiekou.AI | $0.18 | $0.45 | 31 Jul 2026 |
| 302.AI | $0.2 | $0.5 | 31 Jul 2026 |
| Helicone | $0.2 | $0.5 | 31 Jul 2026 |
| Microsoft Foundry | $0.2 | $0.5 | 31 Jul 2026 |
| Poe | $0.2 | $0.5 | 31 Jul 2026 |
| xAI | $0.2 | $0.5 | 31 Jul 2026 |
Only the base tier and only per-token prices are shown. Batch, discounted and cached rates, as well as prices per image or per second of video, do not go into this table: they cannot stand in the same column as a price per million tokens.
The date in the last column is the day this price first entered our collection. The price may well be older: before that day we simply were not recording it. It has not changed since — otherwise a new row with a new date would stand in its place.
| Task set | Result | Run conditions | Measured by |
|---|---|---|---|
| Arena Score in French | 1,433.69 1,398–1,470 | — | — |
| Arena Score, programming | 1,418.56 1,409–1,428 | — | — |
| Arena Score in Spanish | 1,411.24 1,385–1,437 | — | — |
| Arena Score, long queries | 1,410.64 1,402–1,420 | — | — |
| Arena Score, expert questions | 1,407.49 1,388–1,427 | — | — |
| Arena Score in English | 1,407.02 1,400–1,414 | — | — |
| Arena Score, multi-turn dialogue | 1,404.52 1,394–1,415 | — | — |
| Arena Score, hard prompts | 1,403.28 1,397–1,410 | — | — |
| Arena Score, mathematics | 1,403.28 1,386–1,421 | — | — |
| Arena Score, overall | 1,397.85 1,393–1,403 | — | — |
| Arena Score in Russian | 1,390.48 1,373–1,408 | — | — |
| Arena Score, instruction following | 1,381.66 1,373–1,390 | — | — |
| Arena Score, creative writing | 1,374.71 1,363–1,386 | — | — |
| Arena Score, web development | 1,160.41 1,133–1,188 | — | — |