Gemini 3.1 Pro Preview Custom Tools vs Claude Sonnet 4.5
Gemini 3.1 Pro Preview Custom Tools is cheaper on output tokens, while Gemini 3.1 Pro Preview Custom Tools offers a larger context window. Choose Gemini 3.1 Pro Preview Custom Tools or Claude Sonnet 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Gemini 3.1 Pro Preview Custom Tools | Claude Sonnet 4.5 |
|---|---|---|
| Provider | Merge Gateway | Merge Gateway |
| Input / 1M tokens | $2.00 | $3.00 |
| Output / 1M tokens | $12.00 | $15.00 |
| Context window | 1M | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Feb 2026 | Sep 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.