Claude 3.5 Sonnet vs Kimi-Dev
Anthropic Claude 3.5 Sonnet | Moonshot AI Kimi-Dev | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Jun 20 2024 | Jun 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 72B |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 45% | — |
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. | 33.4% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 59.4% | — |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet shipped 346 days before Kimi-Dev | |
Which is better: Claude 3.5 Sonnet or Kimi-Dev?
Claude 3.5 Sonnet and Kimi-Dev don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3.5 Sonnet shipped 346 days before Kimi-Dev, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet is proprietary, while Kimi-Dev is open weight.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet and Kimi-Dev don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.
Kimi-Dev was released by Moonshot AI on Jun 2025.
Claude 3.5 Sonnet is a proprietary model released by Anthropic. Kimi-Dev is an open weight model released by Moonshot AI.
Other comparisons
Claude 3.5 Sonnet vs GPT-5.6 SolKimi-Dev vs GPT-5.6 SolClaude 3.5 Sonnet vs Gemini OmniKimi-Dev vs Gemini OmniClaude 3.5 Sonnet vs Muse Spark 1.1Kimi-Dev vs Muse Spark 1.1Claude 3.5 Sonnet vs Grok 4.5Kimi-Dev vs Grok 4.5Claude 3.5 Sonnet vs DeepSeek-V4-ProKimi-Dev vs DeepSeek-V4-ProClaude 3.5 Sonnet vs Mistral Medium 3.5Kimi-Dev vs Mistral Medium 3.5