Claude Sonnet 4vsDeepSeek-V3.2
Claude Sonnet 4 | DeepSeek-V3.2 | |
|---|---|---|
| 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. | 30%Best | 13% |
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. | 72.7% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.4% | — |
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. | — | 1361 |
| Overview | ||
| Company | Anthropic | DeepSeek |
| Release date | May 22 2025 | Dec 1 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude Sonnet 4 or DeepSeek-V3.2?
Claude Sonnet 4 leads DeepSeek-V3.2 on 1 of the 1 benchmark they both report (BullshitBench v2). Claude Sonnet 4 shipped 193 days before DeepSeek-V3.2, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4 is proprietary, while DeepSeek-V3.2 is open weight.
On BullshitBench v2, Claude Sonnet 4 leads at 30% vs DeepSeek-V3.2 at 13%.
Frequently asked questions
Claude Sonnet 4 was released by Anthropic on May 22 2025.
DeepSeek-V3.2 was released by DeepSeek on Dec 1 2025.
Claude Sonnet 4 is a proprietary model released by Anthropic. DeepSeek-V3.2 is an open weight model released by DeepSeek.
Other comparisons
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