Claude Opus 4 vs GLM-4.6
Anthropic Claude Opus 4 | Z.ai GLM-4.6 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | May 22 2025 | Sep 30 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 355B |
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. | 34% | — |
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. | 72.5%Best | 68% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 79.6% | — |
| Timeline | ||
| Release gap | Claude Opus 4 shipped 131 days before GLM-4.6 | |
Which is better: Claude Opus 4 or GLM-4.6?
Claude Opus 4 leads GLM-4.6 on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude Opus 4 shipped 131 days before GLM-4.6, so benchmark comparisons should account for the intervening progress.
Claude Opus 4 is proprietary, while GLM-4.6 is open weight.
On SWE-Bench Verified, Claude Opus 4 leads at 72.5% vs GLM-4.6 at 68%.
Frequently asked questions
Claude Opus 4 was released by Anthropic on May 22 2025.
GLM-4.6 was released by Z.ai on Sep 30 2025.
Claude Opus 4 leads on SWE-Bench Verified — Claude Opus 4 72.5% vs GLM-4.6 68%.
Claude Opus 4 is a proprietary model released by Anthropic. GLM-4.6 is an open weight model released by Z.ai.
Other comparisons
Claude Opus 4 vs GPT-5.6 SolGLM-4.6 vs GPT-5.6 SolClaude Opus 4 vs Gemini OmniGLM-4.6 vs Gemini OmniClaude Opus 4 vs Muse SparkGLM-4.6 vs Muse SparkClaude Opus 4 vs Grok 4.3 BetaGLM-4.6 vs Grok 4.3 BetaClaude Opus 4 vs DeepSeek-V4-ProGLM-4.6 vs DeepSeek-V4-ProClaude Opus 4 vs Mistral Medium 3.5GLM-4.6 vs Mistral Medium 3.5