{
  "$schema": "https://modeldeprecations.dev/api/v1/schema.json",
  "provider": "anthropic",
  "model": "claude-3-opus-20240229",
  "name": "Claude Opus 3",
  "aliases": [],
  "description": "The first Claude to beat GPT-4 on published benchmarks, and the model that put Anthropic in serious contention. It had an unusually long deprecation window — six months — and its retirement prompted Anthropic's public commitments on preserving model weights after shutdown.",
  "released_on": "2024-02-29",
  "deprecated_on": "2025-06-30",
  "shutdown_on": "2026-01-05",
  "status": "retired",
  "replacements": [
    {
      "provider": "anthropic",
      "model": "claude-opus-4-8",
      "recommended": true,
      "note": "Opus 4.8 is cheaper per token than Opus 3 was, has a 1M-token context window against 200k, and rejects temperature, top_p and top_k.",
      "external": false
    }
  ],
  "sources": [
    {
      "url": "https://platform.claude.com/docs/en/about-claude/model-deprecations",
      "title": "Anthropic model deprecations",
      "accessed": "2026-07-30"
    }
  ],
  "last_verified": "2026-07-30",
  "computed_status": "retired",
  "asOf": "2026-07-30"
}