Grok 4.5 vs GLM-5.1
SpaceXAI Grok 4.5 | Z.ai GLM-5.1 | |
|---|---|---|
| Overview | ||
| Company | SpaceXAI | Z.ai |
| Release date | Jul 8 2026 | Apr 7 2026 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 744B |
Context window | — | 200k |
| 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. | — | 22% |
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | 64.7% | — |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | 78% | — |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | 62% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 75% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 83.3% | — |
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. | — | 63.5% |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | — | 68% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 86.2% |
| Timeline | ||
| Release gap | GLM-5.1 shipped 92 days before Grok 4.5 | |
Which is better: Grok 4.5 or GLM-5.1?
Grok 4.5 and GLM-5.1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-5.1 shipped 92 days before Grok 4.5, so benchmark comparisons should account for the intervening progress.
Grok 4.5 is proprietary, while GLM-5.1 is open weight.
Direct benchmark comparisons are unavailable — Grok 4.5 and GLM-5.1 don't publish scores on any of the same benchmarks.
Frequently asked questions
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
GLM-5.1 was released by Z.ai on Apr 7 2026.
Grok 4.5 is a proprietary model released by SpaceXAI. GLM-5.1 is an open weight model released by Z.ai.