Claude 3 Sonnet vs GLM-4.5
Anthropic Claude 3 Sonnet | Z.ai GLM-4.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Mar 4 2024 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 355B |
Context window | — | 128k |
| Benchmarks | ||
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. | — | 64.2% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 40.4% | 79.1%Best |
| Timeline | ||
| Release gap | Claude 3 Sonnet shipped 511 days before GLM-4.5 | |
Which is better: Claude 3 Sonnet or GLM-4.5?
GLM-4.5 leads Claude 3 Sonnet on 1 of the 1 benchmark they both report (GPQA Diamond). Claude 3 Sonnet shipped 511 days before GLM-4.5, so benchmark comparisons should account for the intervening progress.
Claude 3 Sonnet is proprietary, while GLM-4.5 is open weight.
On GPQA Diamond, GLM-4.5 leads at 79.1% vs Claude 3 Sonnet at 40.4%.
Frequently asked questions
Claude 3 Sonnet was released by Anthropic on Mar 4 2024.
GLM-4.5 was released by Z.ai on Jul 28 2025.
GLM-4.5 leads on GPQA Diamond — Claude 3 Sonnet 40.4% vs GLM-4.5 79.1%.
Claude 3 Sonnet is a proprietary model released by Anthropic. GLM-4.5 is an open weight model released by Z.ai.
Other comparisons
Claude 3 Sonnet vs GPT-5.6 SolGLM-4.5 vs GPT-5.6 SolClaude 3 Sonnet vs Gemini OmniGLM-4.5 vs Gemini OmniClaude 3 Sonnet vs Muse SparkGLM-4.5 vs Muse SparkClaude 3 Sonnet vs Grok 4.3 BetaGLM-4.5 vs Grok 4.3 BetaClaude 3 Sonnet vs DeepSeek-V4-ProGLM-4.5 vs DeepSeek-V4-ProClaude 3 Sonnet vs Mistral Medium 3.5GLM-4.5 vs Mistral Medium 3.5