# Claude Sonnet 4.6: AI model fact sheet

- **Provider:** anthropic
- **Released:** 2026-02-17
- **Context window:** 1,000,000 tokens
- **API pricing:** $3.00 / 1M input, $15.00 / 1M output
- **OpenRouter ID:** anthropic/claude-sonnet-4.6
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use, tool-use

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 memory, polished document creation, and confident computer use for web QA and workflow automation.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 79.0% |
| SWE-bench Verified (modified) | 80.2% |
| ARC-AGI-2 | 60.4% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/claude-sonnet-4.6