Claude 3 Haiku vs gpt-oss-120b
Anthropic Claude 3 Haiku | OpenAI gpt-oss-120b | |
|---|---|---|
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Mar 4 2024 | Aug 5 2025 |
| Access | Proprietary | Open Weight |
| 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. | 10% | 11%Best |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 33.3% | — |
| Timeline | ||
| Release gap | Claude 3 Haiku shipped 519 days before gpt-oss-120b | |
Which is better: Claude 3 Haiku or gpt-oss-120b?
gpt-oss-120b leads Claude 3 Haiku on 1 of the 1 benchmark they both report (BullshitBench v2). Claude 3 Haiku shipped 519 days before gpt-oss-120b, so benchmark comparisons should account for the intervening progress.
Claude 3 Haiku is proprietary, while gpt-oss-120b is open weight.
On BullshitBench v2, gpt-oss-120b leads at 11% vs Claude 3 Haiku at 10%.
Frequently asked questions
Claude 3 Haiku was released by Anthropic on Mar 4 2024.
gpt-oss-120b was released by OpenAI on Aug 5 2025.
Claude 3 Haiku is a proprietary model released by Anthropic. gpt-oss-120b is an open weight model released by OpenAI.
Other comparisons
Claude 3 Haiku vs Gemini Omnigpt-oss-120b vs Gemini OmniClaude 3 Haiku vs Muse Spark 1.1gpt-oss-120b vs Muse Spark 1.1Claude 3 Haiku vs Grok 4.5gpt-oss-120b vs Grok 4.5Claude 3 Haiku vs DeepSeek-V4-Progpt-oss-120b vs DeepSeek-V4-ProClaude 3 Haiku vs Mistral Medium 3.5gpt-oss-120b vs Mistral Medium 3.5Claude 3 Haiku vs Kimi K2.7 Codegpt-oss-120b vs Kimi K2.7 Code