Gemini 3.1 Pro Preview scores 41.4 on the Respan Index (#42), ahead of Gemini 3 Pro Preview at 40.8 (#44). Gemini 3.1 Pro Preview leads on 9 of the 11 benchmarks both report. Both cost about the same per token at list price.
* Estimated: no published scores in that category. How the Respan Index works
| SimpleQA Verified |
| 73.5% |
| 72.1% |
| SWE-bench Verified (Epoch AI) | 75.6% | 72.9% |
| Vending-Bench 2 (Andon Labs) | 3774.25 | 5478.16 |
| WeirdML (Håvard Tveit Ihle) | 72.1% | 69.9% |
| GSO Opt@1 (GSO) | 21.6% | 17.7% |
| BALROG (BALROG) | 57% | 58.1% |
| SimpleBench (SimpleBench) | 79.6% | 76.4% |
Higher is better. Each score links to where it was published.