Claude Sonnet 4vsgpt-oss-120b
Claude Sonnet 4 | gpt-oss-120b | |
|---|---|---|
| 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 | 11% |
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% | — |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | May 22 2025 | Aug 5 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude Sonnet 4 or gpt-oss-120b?
Claude Sonnet 4 leads gpt-oss-120b on 1 of the 1 benchmark they both report (BullshitBench v2). Claude Sonnet 4 shipped 75 days before gpt-oss-120b, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4 is proprietary, while gpt-oss-120b is open weight.
On BullshitBench v2, Claude Sonnet 4 leads at 30% vs gpt-oss-120b at 11%.
Frequently asked questions
Claude Sonnet 4 was released by Anthropic on May 22 2025.
gpt-oss-120b was released by OpenAI on Aug 5 2025.
Claude Sonnet 4 is a proprietary model released by Anthropic. gpt-oss-120b is an open weight model released by OpenAI.
Other comparisons
Claude Sonnet 4vsGemini 3.6 Flashgpt-oss-120bvsGemini 3.6 FlashClaude Sonnet 4vsMuse Glimmergpt-oss-120bvsMuse GlimmerClaude Sonnet 4vsGrok 4.5gpt-oss-120bvsGrok 4.5Claude Sonnet 4vsDeepSeek-V4-Flash-0731gpt-oss-120bvsDeepSeek-V4-Flash-0731Claude Sonnet 4vsMistral Medium 3.5gpt-oss-120bvsMistral Medium 3.5Claude Sonnet 4vsKimi K3gpt-oss-120bvsKimi K3