Side-by-side pricing, context window, and capabilities — try both on ChatLima.
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Image and document understanding
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
Image and document understanding
| Feature | Anthropic: Claude Sonnet 4.6 | OpenAI: GPT-5.1 |
|---|---|---|
| Provider | OpenRouter | OpenRouter |
| Context Length | 1,000,000 tokens | 400,000 tokens |
| Input Price | $3.00/M | $1.25/M |
| Output Price | $15.00/M | $10.00/M |
| Vision Support | Yes | Yes |
| Higher cost | Yes | Yes |
| Capabilities | TextVision | TextVision |