0 vs 1 benchmarks won
Anthropic Claude 3.5 Haiku | Moonshot AI Kimi K2 Thinking | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Oct 22 2024 | Nov 6 2025 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 256k |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 40.6% | 71.3%Best |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 41.6% | — |
| Timeline | ||
| Release gap | Claude 3.5 Haiku shipped 380 days before Kimi K2 Thinking | |
Kimi K2 Thinking leads Claude 3.5 Haiku on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude 3.5 Haiku shipped 380 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.
Kimi K2 Thinking is an open-source / open-weight model; Claude 3.5 Haiku is proprietary.
On SWE-Bench Verified, Kimi K2 Thinking leads at 71.3% vs Claude 3.5 Haiku at 40.6%.