Anthropic · capability answer
What does Claude Sonnet 4.6 do?
Balanced daily driver for code and prose.
The short answer
Claude Sonnet 4.6 is built by Anthropic and is positioned for code, writing, chat and analysis. Our readings score it strongest on code generation and long-form writing.
Its weakest measured axis is response speed (88/100), so plan around that when the work depends on it. Access is freemium, and the weights are closed, so you can only reach it through the vendor's own service.
Reasoning
92
Coding
94
Writing
94
Analysis
90
Speed
88
Energy, carbon and water
Carbon footprint reads 71/100. Serving runs largely on low-carbon power, with credible reporting behind it.
Water and local impact reads 66/100. Some sites use evaporative cooling in regions with moderate water stress.
Speed and efficiency also matter here: a 88/100 speed reading means fewer compute-seconds per answer for routine work.