GPT-5.4 nano vs GLM-4.5
OpenAI GPT-5.4 nano | Z.ai GLM-4.5 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Mar 17 2026 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 355B |
Context window | — | 128k |
| 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. | 14%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. | — | 64.2% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 79.1% |
| Timeline | ||
| Release gap | GLM-4.5 shipped 232 days before GPT-5.4 nano | |
Which is better: GPT-5.4 nano or GLM-4.5?
GPT-5.4 nano leads GLM-4.5 on 1 of the 1 benchmark they both report (BullshitBench v2). GLM-4.5 shipped 232 days before GPT-5.4 nano, so benchmark comparisons should account for the intervening progress.
GPT-5.4 nano is proprietary, while GLM-4.5 is open weight.
On BullshitBench v2, GPT-5.4 nano leads at 14% vs GLM-4.5 at 8%.
Frequently asked questions
GPT-5.4 nano was released by OpenAI on Mar 17 2026.
GLM-4.5 was released by Z.ai on Jul 28 2025.
GPT-5.4 nano is a proprietary model released by OpenAI. GLM-4.5 is an open weight model released by Z.ai.
Other comparisons
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