Grok 4 Fast vs GLM-4
xAI Grok 4 Fast | Z.ai GLM-4 | |
|---|---|---|
| Overview | ||
| Company | xAI | Z.ai |
| Release date | Sep 2025 | Jan 16 2024 |
| Access | Proprietary | Proprietary |
| Timeline | ||
| Release gap | GLM-4 shipped 594 days before Grok 4 Fast | |
Which is better: Grok 4 Fast or GLM-4?
Grok 4 Fast 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 594 days before Grok 4 Fast, 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 — Grok 4 Fast and GLM-4 don't publish scores on any of the same benchmarks.
Frequently asked questions
Grok 4 Fast was released by xAI on Sep 2025.
GLM-4 was released by Z.ai on Jan 16 2024.
Other comparisons
Grok 4 Fast vs Claude Fable 5GLM-4 vs Claude Fable 5Grok 4 Fast vs GPT-5.6 SolGLM-4 vs GPT-5.6 SolGrok 4 Fast vs Gemini OmniGLM-4 vs Gemini OmniGrok 4 Fast vs Muse SparkGLM-4 vs Muse SparkGrok 4 Fast vs DeepSeek-V4-ProGLM-4 vs DeepSeek-V4-ProGrok 4 Fast vs Mistral Medium 3.5GLM-4 vs Mistral Medium 3.5