2 vs 0 benchmarks won
Anthropic Claude Opus 4.5 | Moonshot AI Kimi Linear | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Nov 24 2025 | Oct 2025 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | 48B |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | 87% | — |
Software engineering SWE-Bench Verified | 80.9% | — |
Multimodal understanding MMMU | — | — |
| Timeline | ||
| Release gap | Kimi Linear shipped 54 days before Claude Opus 4.5 | |
Claude Opus 4.5 leads Kimi Linear on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi Linear shipped 54 days before Claude Opus 4.5, so benchmark comparisons should account for the intervening progress.
Kimi Linear is an open-source / open-weight model; Claude Opus 4.5 is proprietary.
Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.