Kimi K2.5vsQwen3-Coder
Kimi K2.5 | Qwen3-Coder | |
|---|---|---|
| Specifications | ||
Parameters | 1T | 480B |
Context window | 256k | 256k |
| 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. | 52% | — |
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. | 76.8% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 31.9% | — |
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. | 21% | — |
Competitive coding LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | 85% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 87.6% | — |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1433 | — |
| Overview | ||
| Company | Moonshot AI | Qwen |
| Release date | Jan 27 2026 | Jul 22 2025 |
| Access | Open Weight | Open Weight |
Which is better: Kimi K2.5 or Qwen3-Coder?
Kimi K2.5 and Qwen3-Coder don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Qwen3-Coder shipped 189 days before Kimi K2.5, so benchmark comparisons should account for the intervening progress.
Kimi K2.5 has 1T parameters, while Qwen3-Coder has 480B. Context windows are 256k (Kimi K2.5) vs 256k (Qwen3-Coder).
Direct benchmark comparisons are unavailable — Kimi K2.5 and Qwen3-Coder don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K2.5 was released by Moonshot AI on Jan 27 2026.
Qwen3-Coder was released by Qwen on Jul 22 2025.
Kimi K2.5 has a 256k context window; Qwen3-Coder has 256k.
Other comparisons
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