Claude 3.5 SonnetvsGLM-4.6
Claude 3.5 Sonnet | GLM-4.6 | |
|---|---|---|
| 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. | 45% | — |
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. | 33.4% | 68%Best |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 59.4% | — |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1339 |
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Jun 20 2024 | Sep 30 2025 |
| Access | Proprietary | Open Weight |
Which is better: Claude 3.5 Sonnet or GLM-4.6?
GLM-4.6 leads Claude 3.5 Sonnet on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude 3.5 Sonnet shipped 467 days before GLM-4.6, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet is proprietary, while GLM-4.6 is open weight.
On SWE-Bench Verified, GLM-4.6 leads at 68% vs Claude 3.5 Sonnet at 33.4%.
Frequently asked questions
Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.
GLM-4.6 was released by Z.ai on Sep 30 2025.
GLM-4.6 leads on SWE-Bench Verified — Claude 3.5 Sonnet 33.4% vs GLM-4.6 68%.
Claude 3.5 Sonnet is a proprietary model released by Anthropic. GLM-4.6 is an open weight model released by Z.ai.
Other comparisons
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