Claude 2 vs Kimi K2 (0905)
Anthropic Claude 2 | Moonshot AI Kimi K2 (0905) | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Jul 11 2023 | Sep 5 2025 |
| Access | Proprietary | Open Weight |
| 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. | — | 65.8% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 75.1% |
| Timeline | ||
| Release gap | Claude 2 shipped 787 days before Kimi K2 (0905) | |
Which is better: Claude 2 or Kimi K2 (0905)?
Claude 2 and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2 shipped 787 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.
Claude 2 is proprietary, while Kimi K2 (0905) is open weight.
Direct benchmark comparisons are unavailable — Claude 2 and Kimi K2 (0905) don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 2 was released by Anthropic on Jul 11 2023.
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Claude 2 is a proprietary model released by Anthropic. Kimi K2 (0905) is an open weight model released by Moonshot AI.
Other comparisons
Claude 2 vs GPT-5.6 SolKimi K2 (0905) vs GPT-5.6 SolClaude 2 vs Gemini OmniKimi K2 (0905) vs Gemini OmniClaude 2 vs Muse Spark 1.1Kimi K2 (0905) vs Muse Spark 1.1Claude 2 vs Grok 4.5Kimi K2 (0905) vs Grok 4.5Claude 2 vs DeepSeek-V4-ProKimi K2 (0905) vs DeepSeek-V4-ProClaude 2 vs Mistral Medium 3.5Kimi K2 (0905) vs Mistral Medium 3.5