Claude 3.5 Sonnet (upgraded) vs Kimi K2.7 Code
Anthropic Claude 3.5 Sonnet (upgraded) | Moonshot AI Kimi K2.7 Code | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Oct 22 2024 | Jun 12 2026 |
| 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. | 49% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 75% |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 598 days before Kimi K2.7 Code | |
Which is better: Claude 3.5 Sonnet (upgraded) or Kimi K2.7 Code?
Claude 3.5 Sonnet (upgraded) and Kimi K2.7 Code 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 598 days before Kimi K2.7 Code, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet (upgraded) is proprietary, while Kimi K2.7 Code is open weight.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet (upgraded) and Kimi K2.7 Code 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 K2.7 Code was released by Moonshot AI on Jun 12 2026.
Claude 3.5 Sonnet (upgraded) is a proprietary model released by Anthropic. Kimi K2.7 Code is an open weight model released by Moonshot AI.