Claude Sonnet 4 vs GLM-5
Anthropic Claude Sonnet 4 | Z.ai GLM-5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | May 22 2025 | Feb 12 2026 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 744B |
| 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. | 30% | — |
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. | 72.7% | 77.8%Best |
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. | — | 73.3% |
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. | — | 56.2% |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | — | 75.9% |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | — | 50.4% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.4% | 86%Best |
| Timeline | ||
| Release gap | Claude Sonnet 4 shipped 266 days before GLM-5 | |
Which is better: Claude Sonnet 4 or GLM-5?
GLM-5 leads Claude Sonnet 4 on 2 of the 2 benchmarks they both report (SWE-Bench Verified, GPQA Diamond). Claude Sonnet 4 shipped 266 days before GLM-5, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4 is proprietary, while GLM-5 is open weight.
On SWE-Bench Verified, GLM-5 leads at 77.8% vs Claude Sonnet 4 at 72.7%. On GPQA Diamond, GLM-5 leads at 86% vs Claude Sonnet 4 at 75.4%.
Frequently asked questions
Claude Sonnet 4 was released by Anthropic on May 22 2025.
GLM-5 was released by Z.ai on Feb 12 2026.
GLM-5 leads on SWE-Bench Verified — Claude Sonnet 4 72.7% vs GLM-5 77.8%.
GLM-5 leads on GPQA Diamond — Claude Sonnet 4 75.4% vs GLM-5 86%.
Claude Sonnet 4 is a proprietary model released by Anthropic. GLM-5 is an open weight model released by Z.ai.