Gemini 3.1 Pro Preview vs Grok 4
Gemini 3.1 Pro Preview is cheaper on output tokens, while Gemini 3.1 Pro Preview offers a larger context window. Choose Gemini 3.1 Pro Preview or Grok 4 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Gemini 3.1 Pro Preview | Grok 4 |
|---|---|---|
| Provider | FastRouter | FastRouter |
| Input / 1M tokens | $2.00 | $3.00 |
| Output / 1M tokens | $12.00 | $15.00 |
| Context window | 1M | 256K |
| Parameters | — | 3T |
| Open weights | No | No |
| Released | Feb 2026 | Jul 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.