Kimi K2vsQwen3.5-Plus
Kimi K2 | Qwen3.5-Plus | |
|---|---|---|
| Specifications | ||
Parameters | 1T | — |
Context window | 128k | 1M |
| 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% | — |
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% | — |
| Overview | ||
| Company | Moonshot AI | Qwen |
| Release date | Jul 11 2025 | Feb 16 2026 |
| Access | Open Weight | Proprietary |
Which is better: Kimi K2 or Qwen3.5-Plus?
Kimi K2 and Qwen3.5-Plus don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K2 shipped 220 days before Qwen3.5-Plus, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (Kimi K2) vs 1M (Qwen3.5-Plus). Kimi K2 is open weight, while Qwen3.5-Plus is proprietary.
Direct benchmark comparisons are unavailable — Kimi K2 and Qwen3.5-Plus don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Qwen3.5-Plus was released by Qwen on Feb 16 2026.
Kimi K2 has a 128k context window; Qwen3.5-Plus has 1M.
Kimi K2 is an open weight model released by Moonshot AI. Qwen3.5-Plus is a proprietary model released by Qwen.
Other comparisons
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