Claude Sonnet 4.5 vs GLM-4.6
Anthropic Claude Sonnet 4.5 | Z.ai GLM-4.6 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Sep 29 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. | 79% | — |
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. | 77.2%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. | 83.4% | — |
Multimodal MMMUTests the AI on understanding images and text together across many college subjects. Higher is better. | 68% | — |
| Timeline | ||
| Release gap | Claude Sonnet 4.5 shipped 1 days before GLM-4.6 | |
Which is better: Claude Sonnet 4.5 or GLM-4.6?
Claude Sonnet 4.5 leads GLM-4.6 on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude Sonnet 4.5 shipped 1 days before GLM-4.6, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4.5 is proprietary, while GLM-4.6 is open weight.
On SWE-Bench Verified, Claude Sonnet 4.5 leads at 77.2% vs GLM-4.6 at 68%.
Frequently asked questions
Claude Sonnet 4.5 was released by Anthropic on Sep 29 2025.
GLM-4.6 was released by Z.ai on Sep 30 2025.
Claude Sonnet 4.5 leads on SWE-Bench Verified — Claude Sonnet 4.5 77.2% vs GLM-4.6 68%.
Claude Sonnet 4.5 is a proprietary model released by Anthropic. GLM-4.6 is an open weight model released by Z.ai.
Other comparisons
Claude Sonnet 4.5 vs GPT-5.6 SolGLM-4.6 vs GPT-5.6 SolClaude Sonnet 4.5 vs Gemini OmniGLM-4.6 vs Gemini OmniClaude Sonnet 4.5 vs Muse SparkGLM-4.6 vs Muse SparkClaude Sonnet 4.5 vs Grok 4.3 BetaGLM-4.6 vs Grok 4.3 BetaClaude Sonnet 4.5 vs DeepSeek-V4-ProGLM-4.6 vs DeepSeek-V4-ProClaude Sonnet 4.5 vs Mistral Medium 3.5GLM-4.6 vs Mistral Medium 3.5