2 vs 0 benchmarks won
Google Gemini 3.1 Pro | Moonshot AI Kimi K2 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | |
| Release date | Feb 19 2026 | Jul 11 2025 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 128k |
| Benchmarks | ||
Science reasoning GPQA Diamond | 94.3% | 75.1% |
Software engineering SWE-Bench Verified | 80.6% | 65.8% |
Multimodal understanding MMMU | — | — |
| Timeline | ||
| Release gap | Kimi K2 shipped 223 days before Gemini 3.1 Pro | |
Gemini 3.1 Pro leads Kimi K2 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi K2 shipped 223 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.
Kimi K2 is an open-source / open-weight model; Gemini 3.1 Pro is proprietary.
On GPQA Diamond, Gemini 3.1 Pro scores 94.3%, 19.2 points above Kimi K2 at 75.1%. On SWE-Bench Verified, Gemini 3.1 Pro scores 80.6%, 14.8 points above Kimi K2 at 65.8%.