# Claude Opus 4: AI model fact sheet

- **Provider:** anthropic
- **Released:** 2025-05-22
- **Context window:** 200,000 tokens
- **Parameters:** Not disclosed
- **API pricing:** $15.00 / 1M input, $75.00 / 1M output
- **OpenRouter ID:** anthropic/claude-opus-4
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use, memory

Claude Opus 4 is Anthropic's most powerful model, setting new standards for coding, advanced reasoning, and AI agents. It excels at long-running tasks and complex problem-solving, with capabilities like extended thinking with tool use and improved memory.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 72.5% |
| Terminal-bench | 43.2% |
| GPQA Diamond | 74.9% (w/o extended thinking) |
| MMMLU | 87.4% (w/o extended thinking) |
| MMMU | 73.7% (w/o extended thinking) |
| AIME | 33.9% (w/o extended thinking) |

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