Claude 3 OpusvsDeepSeek-V4-Flash
Claude 3 Opus | DeepSeek-V4-Flash | |
|---|---|---|
| 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. | — | 18% |
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% | — |
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. | — | 91.6% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 50.4% | 88.1%Best |
| Timeline | ||
| Release gap | Claude 3 Opus shipped 781 days before DeepSeek-V4-Flash | |
| Overview | ||
| Company | Anthropic | DeepSeek |
| Release date | Mar 4 2024 | Apr 24 2026 |
| Access | Proprietary | Open Weight |
Which is better: Claude 3 Opus or DeepSeek-V4-Flash?
DeepSeek-V4-Flash leads Claude 3 Opus on 1 of the 1 benchmark they both report (GPQA Diamond). Claude 3 Opus shipped 781 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.
Claude 3 Opus is proprietary, while DeepSeek-V4-Flash is open weight.
On GPQA Diamond, DeepSeek-V4-Flash leads at 88.1% vs Claude 3 Opus at 50.4%.
Frequently asked questions
Claude 3 Opus was released by Anthropic on Mar 4 2024.
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
DeepSeek-V4-Flash leads on GPQA Diamond — Claude 3 Opus 50.4% vs DeepSeek-V4-Flash 88.1%.
Claude 3 Opus is a proprietary model released by Anthropic. DeepSeek-V4-Flash is an open weight model released by DeepSeek.
Other comparisons
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