Claude Opus 4.5vsQwen3-Coder
Claude Opus 4.5 | Qwen3-Coder | |
|---|---|---|
| Specifications | ||
Parameters | — | 480B |
Context window | — | 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. | 90%Best | 20% |
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. | 80.9% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 87% | — |
| Overview | ||
| Company | Anthropic | Qwen |
| Release date | Nov 24 2025 | Jul 22 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude Opus 4.5 or Qwen3-Coder?
Claude Opus 4.5 leads Qwen3-Coder on 1 of the 1 benchmark they both report (BullshitBench v2). Qwen3-Coder shipped 125 days before Claude Opus 4.5, so benchmark comparisons should account for the intervening progress.
Claude Opus 4.5 is proprietary, while Qwen3-Coder is open weight.
On BullshitBench v2, Claude Opus 4.5 leads at 90% vs Qwen3-Coder at 20%.
Frequently asked questions
Claude Opus 4.5 was released by Anthropic on Nov 24 2025.
Qwen3-Coder was released by Qwen on Jul 22 2025.
Claude Opus 4.5 is a proprietary model released by Anthropic. Qwen3-Coder is an open weight model released by Qwen.
Other comparisons
Claude Opus 4.5vsGPT-5.6 SolQwen3-CodervsGPT-5.6 SolClaude Opus 4.5vsGemini 3.6 FlashQwen3-CodervsGemini 3.6 FlashClaude Opus 4.5vsMuse Spark 1.2Qwen3-CodervsMuse Spark 1.2Claude Opus 4.5vsGrok 4.5Qwen3-CodervsGrok 4.5Claude Opus 4.5vsDeepSeek-V4-Flash-0731Qwen3-CodervsDeepSeek-V4-Flash-0731Claude Opus 4.5vsMistral Medium 3.5Qwen3-CodervsMistral Medium 3.5