gpt-oss-20bvsGLM-4-9B
gpt-oss-20b | GLM-4-9B | |
|---|---|---|
| Specifications | ||
Parameters | 21B | 9B |
Context window | 128k | — |
| Benchmarks | ||
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. | 60.7% | — |
Multidisciplinary reasoning Humanity's Last Exam · no toolsHumanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | 10.9% | — |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | 17.3% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 71.5% | — |
General knowledge MMLUA 57-subject multiple-choice exam — history, law, medicine, maths — that was the standard measure of how much a model knows from 2020 until roughly 2024, when frontier scores crowded into the high 80s and labs moved on to harder tests. The scores here were published years apart under different testing setups, so read them as a historical record rather than a like-for-like ranking. Higher is better. | 85.3% | — |
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Aug 5 2025 | Jun 5 2024 |
| Access | Open Weight | Open Weight |
Which is better: gpt-oss-20b or GLM-4-9B?
gpt-oss-20b 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 426 days before gpt-oss-20b, so benchmark comparisons should account for the intervening progress.
gpt-oss-20b has 21B parameters, while GLM-4-9B has 9B.
Direct benchmark comparisons are unavailable — gpt-oss-20b and GLM-4-9B don't publish scores on any of the same benchmarks.
Frequently asked questions
gpt-oss-20b was released by OpenAI on Aug 5 2025.
GLM-4-9B was released by Z.ai on Jun 5 2024.
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