{
  "usage": "POST /<version>[/<family>] with a text/plain body",
  "examples": {
    "/v5": "claude-opus-5",
    "/v4.8": "claude-opus-4-8",
    "/v4.6": "claude-opus-4-6",
    "/v4.6/sonnet": "claude-sonnet-4-6",
    "/v4.5.20251001/haiku": "claude-haiku-4-5-20251001"
  },
  "families": [
    "opus",
    "sonnet",
    "haiku",
    "fable",
    "mythos"
  ],
  "query": {
    "debug": "?debug=1 で model / family / version / charset / elapsed_ms / request_id を追加で返す"
  }
}