# Claude Opus

> Claude Opus, a family of models by Anthropic, listed from OpenRouter. Indexed, not reviewed: facts and our own checks, no score or ranking. Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It…

- Canonical: https://www.anchorterminal.com/tools/claude-opus
- Markdown: https://www.anchorterminal.com/tools/claude-opus.md (~700 tokens)
- Slim: https://www.anchorterminal.com/tools/claude-opus.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/claude-opus.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

# Claude Opus

> Indexed, not reviewed: facts from OpenRouter and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: model family, by Anthropic
- Category: Model APIs & inference (https://www.anchorterminal.com/categories/inference.md)
- Listed because: OpenRouter lists it, with prices from the providers that serve it.
- What OpenRouter says: Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
- Some of these models are reviewed as part of Claude API: https://www.anchorterminal.com/tools/anthropic-api.md

## Models (7)

| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |
| --- | --- | --- | --- | --- | --- | --- |
| Claude Opus 5.5 | `anthropic/claude-opus-5.5` | 2026-09 | 1M | $4 | $20 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 5 | `anthropic/claude-opus-5` | 2026-07 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 4.8 | `anthropic/claude-opus-4.8` | 2026-05 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 4.7 | `anthropic/claude-opus-4.7` | 2026-04 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 4.6 | `anthropic/claude-opus-4.6` | 2026-02 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 4.5 | `anthropic/claude-opus-4.5` | 2025-11 | 200k | $5 | $25 | tools, structured output, reasoning, caching, file, image |
| Claude Opus 4.1 | `anthropic/claude-opus-4.1` | 2025-08 | 200k | $15 | $75 | tools, reasoning, caching, file, image |

Prices and limits as OpenRouter lists them; a provider's own price can differ.

- JSON: https://www.anchorterminal.com/api/v1/tools/claude-opus.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming