Claude Opus 4 vs o4-mini
Anthropic Claude Opus 4 | OpenAI o4-mini | |
|---|---|---|
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | May 22 2025 | Apr 16 2025 |
| Access | Proprietary | Proprietary |
| 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. | 34%Best | 8% |
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. | 72.5% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 79.6% | — |
| Timeline | ||
| Release gap | o4-mini shipped 36 days before Claude Opus 4 | |
Which is better: Claude Opus 4 or o4-mini?
Claude Opus 4 leads o4-mini on 1 of the 1 benchmark they both report (BullshitBench v2). o4-mini shipped 36 days before Claude Opus 4, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, Claude Opus 4 leads at 34% vs o4-mini at 8%.
Frequently asked questions
Claude Opus 4 was released by Anthropic on May 22 2025.
o4-mini was released by OpenAI on Apr 16 2025.
Other comparisons
Claude Opus 4 vs Gemini Omnio4-mini vs Gemini OmniClaude Opus 4 vs Muse Spark 1.1o4-mini vs Muse Spark 1.1Claude Opus 4 vs Grok 4.5o4-mini vs Grok 4.5Claude Opus 4 vs DeepSeek-V4-Proo4-mini vs DeepSeek-V4-ProClaude Opus 4 vs Mistral Medium 3.5o4-mini vs Mistral Medium 3.5Claude Opus 4 vs Kimi K2.7 Codeo4-mini vs Kimi K2.7 Code