Comparison · prices as of 2026-07-04
Gemini 2.5 Flash vs Grok 4 Fast
On price alone, Grok 4 Fast (xAI) runs about 65% cheaper than Gemini 2.5 Flash 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 | Gemini 2.5 Flash | Grok 4 Fast |
|---|---|---|
| Input / MTok | $0.30 | $0.20 |
| Output / MTok | $2.50 | $0.50 |
| Context window | 1M | 2M |
| Max output | 66K | 30K |
| Class | workhorse | fast |
| Reference workload / month | $55.50 | $19.50 |
Sources: Google pricing · xAI pricing. Run your own numbers in the cost calculator.