Comparison · prices as of 2026-07-04
Grok 4 Fast vs Mistral Medium 3.5
On price alone, Grok 4 Fast (xAI) runs about 90% cheaper than Mistral Medium 3.5 for a typical chat workload (2K input + 500 output tokens, 1,000 requests/day). Whether that's the right trade depends on the capability gap — pricing below, verify quality on your own evals.
| Spec | Grok 4 Fast | Mistral Medium 3.5 |
|---|---|---|
| Input / MTok | $0.20 | $1.50 |
| Output / MTok | $0.50 | $7.50 |
| Context window | 2M | 128K |
| Max output | 30K | 32K |
| Class | fast | workhorse |
| Reference workload / month | $19.50 | $202.50 |
Sources: xAI pricing · Mistral pricing. Run your own numbers in the cost calculator.