GPT-5.4 vs GLM-4.5
OpenAI GPT-5.4 | Z.ai GLM-4.5 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Mar 5 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. | 48% | — |
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% |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | 75.1% | — |
Software engineering Expert-SWE (Internal)OpenAI's private set of expert-level software-engineering problems. Higher is better. | 68.5% | — |
General tool use ToolathlonTests how well the AI uses everyday real-world tools and apps to get things done. Higher is better. | 54.6% | — |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | 82.7% | — |
Cybersecurity CyberGymTests the AI on cybersecurity challenges — finding and exploiting software weaknesses inside a safe sandbox. Higher is better. | 79% | — |
Advanced math FrontierMath · Tier 1–3Very hard, research-level math problems. Tiers 1–3 are the (still extremely difficult) lower tiers. Higher is better. | 47.6% | — |
Advanced math FrontierMath · Tier 4Very hard, research-level math problems. Tier 4 is the hardest — close to what professional research mathematicians tackle. Higher is better. | 27.1% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 92.8%Best | 79.1% |
Agentic computer use OSWorld-VerifiedCan the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 75% | — |
Knowledge work GDPval (win/tie rate)How often the AI's work matches or beats a human expert's on real knowledge-work tasks. Higher is better. | 83% | — |
| Timeline | ||
| Release gap | GLM-4.5 shipped 220 days before GPT-5.4 | |
Which is better: GPT-5.4 or GLM-4.5?
GPT-5.4 leads GLM-4.5 on 1 of the 1 benchmark they both report (GPQA Diamond). GLM-4.5 shipped 220 days before GPT-5.4, so benchmark comparisons should account for the intervening progress.
GPT-5.4 is proprietary, while GLM-4.5 is open weight.
On GPQA Diamond, GPT-5.4 leads at 92.8% vs GLM-4.5 at 79.1%.
Frequently asked questions
GPT-5.4 was released by OpenAI on Mar 5 2026.
GLM-4.5 was released by Z.ai on Jul 28 2025.
GPT-5.4 leads on GPQA Diamond — GPT-5.4 92.8% vs GLM-4.5 79.1%.
GPT-5.4 is a proprietary model released by OpenAI. GLM-4.5 is an open weight model released by Z.ai.