Google: Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...
Everything else
| Max output | 66K |
|---|---|
| Input / 1M | $2 |
| Output / 1M | $12 |
| Cache read / 1M | $0.2 |
| Cache write / 1M | $0.375 |
| 1M in + 1M out | $14 |
| Takes | text, audio, image, video, file |
| Returns | text |
| Tools | yes |
| Reasoning | always on · high, medium, low |
| Open weights | no |
| Released | 2026-02-25 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | google/gemini-3.1-pro-preview-customtools |
Benchmarks
| source | epoch |
|---|---|
| sweBenchVerified | 0.756 |
| sweBenchVerifiedStderr | 0.0195 |
Benchmark scores by Epoch AI, CC BY 4.0.
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.