Claude 3.5 Sonnet (upgraded) vs Kimi-Dev
Anthropic Claude 3.5 Sonnet (upgraded) | Moonshot AI Kimi-Dev | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Oct 22 2024 | Jun 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 72B |
| 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. | 49% | — |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 222 days before Kimi-Dev | |
Which is better: Claude 3.5 Sonnet (upgraded) or Kimi-Dev?
Claude 3.5 Sonnet (upgraded) 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 (upgraded) shipped 222 days before Kimi-Dev, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet (upgraded) is proprietary, while Kimi-Dev is open weight.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet (upgraded) and Kimi-Dev don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.
Kimi-Dev was released by Moonshot AI on Jun 2025.
Claude 3.5 Sonnet (upgraded) is a proprietary model released by Anthropic. Kimi-Dev is an open weight model released by Moonshot AI.
Other comparisons
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