Claude 3.5 Sonnet (upgraded) vs GLM-4.5-Air
Anthropic Claude 3.5 Sonnet (upgraded) | Z.ai GLM-4.5-Air | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Z.ai |
| Release date | Oct 22 2024 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 106B |
| 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. | 49% | 59.8%Best |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 279 days before GLM-4.5-Air | |
Which is better: Claude 3.5 Sonnet (upgraded) or GLM-4.5-Air?
GLM-4.5-Air leads Claude 3.5 Sonnet (upgraded) on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude 3.5 Sonnet (upgraded) shipped 279 days before GLM-4.5-Air, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet (upgraded) is proprietary, while GLM-4.5-Air is open weight.
On SWE-Bench Verified, GLM-4.5-Air leads at 59.8% vs Claude 3.5 Sonnet (upgraded) at 49%.
Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.
GLM-4.5-Air was released by Z.ai on Jul 28 2025.
GLM-4.5-Air leads on SWE-Bench Verified — Claude 3.5 Sonnet (upgraded) 49% vs GLM-4.5-Air 59.8%.
Claude 3.5 Sonnet (upgraded) is a proprietary model released by Anthropic. GLM-4.5-Air is an open weight model released by Z.ai.