Composer 1.5 vs Kimi K2
Cursor Composer 1.5 | Moonshot AI Kimi K2 | |
|---|---|---|
| Overview | ||
| Company | Cursor | Moonshot AI |
| Release date | Feb 8 2026 | Jul 11 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 128k |
| 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. | — | 10% |
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% |
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. | 67% | — |
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 | Kimi K2 shipped 212 days before Composer 1.5 | |
Which is better: Composer 1.5 or Kimi K2?
Composer 1.5 and Kimi K2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K2 shipped 212 days before Composer 1.5, so benchmark comparisons should account for the intervening progress.
Composer 1.5 is proprietary, while Kimi K2 is open weight.
Direct benchmark comparisons are unavailable — Composer 1.5 and Kimi K2 don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 1.5 was released by Cursor on Feb 8 2026.
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Composer 1.5 is a proprietary model released by Cursor. Kimi K2 is an open weight model released by Moonshot AI.
Other comparisons
Composer 1.5 vs Claude Sonnet 5Kimi K2 vs Claude Sonnet 5Composer 1.5 vs GPT-5.6 SolKimi K2 vs GPT-5.6 SolComposer 1.5 vs Gemini OmniKimi K2 vs Gemini OmniComposer 1.5 vs Muse Spark 1.1Kimi K2 vs Muse Spark 1.1Composer 1.5 vs Grok 4.5Kimi K2 vs Grok 4.5Composer 1.5 vs DeepSeek-V4-ProKimi K2 vs DeepSeek-V4-Pro