Composer 1.5 vs Kimi K2 (0905)
Cursor Composer 1.5 | Moonshot AI Kimi K2 (0905) | |
|---|---|---|
| Overview | ||
| Company | Cursor | Moonshot AI |
| Release date | Feb 8 2026 | 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% |
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 (0905) shipped 156 days before Composer 1.5 | |
Which is better: Composer 1.5 or Kimi K2 (0905)?
Composer 1.5 and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K2 (0905) shipped 156 days before Composer 1.5, so benchmark comparisons should account for the intervening progress.
Composer 1.5 is proprietary, while Kimi K2 (0905) is open weight.
Direct benchmark comparisons are unavailable — Composer 1.5 and Kimi K2 (0905) 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 (0905) was released by Moonshot AI on Sep 5 2025.
Composer 1.5 is a proprietary model released by Cursor. Kimi K2 (0905) is an open weight model released by Moonshot AI.
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