GPT-5.1 vs GLM-4-9B
OpenAI GPT-5.1 | Z.ai GLM-4-9B | |
|---|---|---|
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Nov 12 2025 | Jun 5 2024 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 9B |
| 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. | 25% | — |
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. | 76.3% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 88.1% | — |
Multimodal MMMUTests the AI on understanding images and text together across many college subjects. Higher is better. | 76% | — |
| Timeline | ||
| Release gap | GLM-4-9B shipped 525 days before GPT-5.1 | |
Which is better: GPT-5.1 or GLM-4-9B?
GPT-5.1 and GLM-4-9B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-4-9B shipped 525 days before GPT-5.1, so benchmark comparisons should account for the intervening progress.
GPT-5.1 is proprietary, while GLM-4-9B is open weight.
Direct benchmark comparisons are unavailable — GPT-5.1 and GLM-4-9B don't publish scores on any of the same benchmarks.
Frequently asked questions
GPT-5.1 was released by OpenAI on Nov 12 2025.
GLM-4-9B was released by Z.ai on Jun 5 2024.
GPT-5.1 is a proprietary model released by OpenAI. GLM-4-9B is an open weight model released by Z.ai.
Other comparisons
GPT-5.1 vs Claude Fable 5GLM-4-9B vs Claude Fable 5GPT-5.1 vs Gemini OmniGLM-4-9B vs Gemini OmniGPT-5.1 vs Muse SparkGLM-4-9B vs Muse SparkGPT-5.1 vs Grok 4.3 BetaGLM-4-9B vs Grok 4.3 BetaGPT-5.1 vs DeepSeek-V4-ProGLM-4-9B vs DeepSeek-V4-ProGPT-5.1 vs Mistral Medium 3.5GLM-4-9B vs Mistral Medium 3.5