Claude 3.5 SonnetvsQwen3-Coder
Claude 3.5 Sonnet | 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. | 45%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. | 33.4% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 59.4% | — |
| Overview | ||
| Company | Anthropic | Qwen |
| Release date | Jun 20 2024 | Jul 22 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude 3.5 Sonnet or Qwen3-Coder?
Claude 3.5 Sonnet leads Qwen3-Coder on 1 of the 1 benchmark they both report (BullshitBench v2). Claude 3.5 Sonnet shipped 397 days before Qwen3-Coder, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet is proprietary, while Qwen3-Coder is open weight.
On BullshitBench v2, Claude 3.5 Sonnet leads at 45% vs Qwen3-Coder at 20%.
Frequently asked questions
Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.
Qwen3-Coder was released by Qwen on Jul 22 2025.
Claude 3.5 Sonnet is a proprietary model released by Anthropic. Qwen3-Coder is an open weight model released by Qwen.
Other comparisons
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