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  "markdown": "# Claude Opus\n\n\u003e 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/\n\n- Kind: model family, by Anthropic\n- Category: Model APIs \u0026 inference (https://www.anchorterminal.com/categories/inference.md)\n- Listed because: OpenRouter lists it, with prices from the providers that serve it.\n- 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...\n- Some of these models are reviewed as part of Claude API: https://www.anchorterminal.com/tools/anthropic-api.md\n\n## Models (7)\n\n| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |\n| --- | --- | --- | --- | --- | --- | --- |\n| Claude Opus 5.5 | `anthropic/claude-opus-5.5` | 2026-09 | 1M | $4 | $20 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 5 | `anthropic/claude-opus-5` | 2026-07 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 4.8 | `anthropic/claude-opus-4.8` | 2026-05 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 4.7 | `anthropic/claude-opus-4.7` | 2026-04 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 4.6 | `anthropic/claude-opus-4.6` | 2026-02 | 1M | $5 | $25 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 4.5 | `anthropic/claude-opus-4.5` | 2025-11 | 200k | $5 | $25 | tools, structured output, reasoning, caching, file, image |\n| Claude Opus 4.1 | `anthropic/claude-opus-4.1` | 2025-08 | 200k | $15 | $75 | tools, reasoning, caching, file, image |\n\nPrices and limits as OpenRouter lists them; a provider's own price can differ.\n\n- JSON: https://www.anchorterminal.com/api/v1/tools/claude-opus.json\n- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming\n",
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