Grok 4.20 Beta vs GLM-4.5-Air
xAI Grok 4.20 Beta | Z.ai GLM-4.5-Air | |
|---|---|---|
| Overview | ||
| Company | xAI | Z.ai |
| Release date | Feb 17 2026 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 106B |
| 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. | 56% | — |
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. | — | 59.8% |
| Timeline | ||
| Release gap | GLM-4.5-Air shipped 204 days before Grok 4.20 Beta | |
Which is better: Grok 4.20 Beta or GLM-4.5-Air?
Grok 4.20 Beta and GLM-4.5-Air don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-4.5-Air shipped 204 days before Grok 4.20 Beta, so benchmark comparisons should account for the intervening progress.
Grok 4.20 Beta is proprietary, while GLM-4.5-Air is open weight.
Direct benchmark comparisons are unavailable — Grok 4.20 Beta and GLM-4.5-Air don't publish scores on any of the same benchmarks.
Frequently asked questions
Grok 4.20 Beta was released by xAI on Feb 17 2026.
GLM-4.5-Air was released by Z.ai on Jul 28 2025.
Grok 4.20 Beta is a proprietary model released by xAI. GLM-4.5-Air is an open weight model released by Z.ai.
Other comparisons
Grok 4.20 Beta vs Claude Fable 5GLM-4.5-Air vs Claude Fable 5Grok 4.20 Beta vs GPT-5.6 SolGLM-4.5-Air vs GPT-5.6 SolGrok 4.20 Beta vs Gemini OmniGLM-4.5-Air vs Gemini OmniGrok 4.20 Beta vs Muse SparkGLM-4.5-Air vs Muse SparkGrok 4.20 Beta vs DeepSeek-V4-ProGLM-4.5-Air vs DeepSeek-V4-ProGrok 4.20 Beta vs Mistral Medium 3.5GLM-4.5-Air vs Mistral Medium 3.5