Claude Sonnet 4.5 vs GLM-4.5-Air
Anthropic Claude Sonnet 4.5 | Z.ai GLM-4.5-Air | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Sep 29 2025 | 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. | 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 | 59.8% |
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 | GLM-4.5-Air shipped 63 days before Claude Sonnet 4.5 | |
Which is better: Claude Sonnet 4.5 or GLM-4.5-Air?
Claude Sonnet 4.5 leads GLM-4.5-Air on 1 of the 1 benchmark they both report (SWE-Bench Verified). GLM-4.5-Air shipped 63 days before Claude Sonnet 4.5, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4.5 is proprietary, while GLM-4.5-Air is open weight.
On SWE-Bench Verified, Claude Sonnet 4.5 leads at 77.2% vs GLM-4.5-Air at 59.8%.
Frequently asked questions
Claude Sonnet 4.5 was released by Anthropic on Sep 29 2025.
GLM-4.5-Air was released by Z.ai on Jul 28 2025.
Claude Sonnet 4.5 leads on SWE-Bench Verified — Claude Sonnet 4.5 77.2% vs GLM-4.5-Air 59.8%.
Claude Sonnet 4.5 is a proprietary model released by Anthropic. GLM-4.5-Air is an open weight model released by Z.ai.
Other comparisons
Claude Sonnet 4.5 vs GPT-5.6 SolGLM-4.5-Air vs GPT-5.6 SolClaude Sonnet 4.5 vs Gemini OmniGLM-4.5-Air vs Gemini OmniClaude Sonnet 4.5 vs Muse SparkGLM-4.5-Air vs Muse SparkClaude Sonnet 4.5 vs Grok 4.3 BetaGLM-4.5-Air vs Grok 4.3 BetaClaude Sonnet 4.5 vs DeepSeek-V4-ProGLM-4.5-Air vs DeepSeek-V4-ProClaude Sonnet 4.5 vs Mistral Medium 3.5GLM-4.5-Air vs Mistral Medium 3.5