Claude Opus 4
anthropic/claude-4-opus-20250522
Claude Opus 4, released by Anthropic on 2025‑05‑14, accepts image, text, and file inputs and produces text output. It supports tool use and reasoning, offers a context length of 200 000 tokens, and is priced at $15 per million input tokens and $75 per million output tokens. The model’s weights are not publicly available.
- tool use
- reasoning
At a glance
Specifications
What the API gives you
- Context window
- 200K tokens
- Max output
- 32K tokens
- Input price
- $15 / 1M tokens
- Output price
- $75 / 1M tokens
- Cache read
- $1.50 / 1M tokens
- Modalities
- image, text, file → text
- Knowledge cutoff
- Jan 31, 2025
- Released
- May 14, 2025
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Measured evidence
Public benchmark record
- Aider Polyglot
- 72%2026-07-17
- Aider Polyglot
- 72%2026-07-21
- LMArena Vision
- 1175 Elo2026-07-12
- SWE-bench Verified†
- 75.2%2025-06-12
LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. † Self-reported scaffold plus model result. Treat it as a claim, not an independent measurement.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.