# Claude Sonnet 4: AI model fact sheet

- **Provider:** anthropic
- **Released:** 2025-05-22
- **Context window:** 200,000 tokens
- **Parameters:** Not disclosed
- **API pricing:** $3.00 / 1M input, $15.00 / 1M output
- **OpenRouter ID:** anthropic/claude-sonnet-4
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use, memory

Claude Sonnet 4 is a significant upgrade to Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to instructions. It balances performance and efficiency for various use cases.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 72.7% |
| GPQA Diamond | 70.0% (w/o extended thinking) |
| MMMLU | 85.4% (w/o extended thinking) |
| MMMU | 72.6% (w/o extended thinking) |
| AIME | 33.1% (w/o extended thinking) |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/claude-sonnet-4