GPT-5-Codex vs GLM-4
OpenAI GPT-5-Codex | Z.ai GLM-4 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Sep 15 2025 | Jan 16 2024 |
| Access | Proprietary | Proprietary |
| 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. | 39% | — |
| Timeline | ||
| Release gap | GLM-4 shipped 608 days before GPT-5-Codex | |
Which is better: GPT-5-Codex or GLM-4?
GPT-5-Codex and GLM-4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-4 shipped 608 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — GPT-5-Codex and GLM-4 don't publish scores on any of the same benchmarks.
Frequently asked questions
GPT-5-Codex was released by OpenAI on Sep 15 2025.
GLM-4 was released by Z.ai on Jan 16 2024.
Other comparisons
GPT-5-Codex vs Claude Fable 5GLM-4 vs Claude Fable 5GPT-5-Codex vs Gemini OmniGLM-4 vs Gemini OmniGPT-5-Codex vs Muse SparkGLM-4 vs Muse SparkGPT-5-Codex vs Grok 4.3 BetaGLM-4 vs Grok 4.3 BetaGPT-5-Codex vs DeepSeek-V4-ProGLM-4 vs DeepSeek-V4-ProGPT-5-Codex vs Mistral Medium 3.5GLM-4 vs Mistral Medium 3.5