Choice

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Choice",
  "title": "Choice",
  "description": "A single completion choice",
  "properties": {
    "index": {
      "type": "integer",
      "title": "Index",
      "description": "Index of the choice in the array"
    },
    "finish_reason": {
      "anyOf": [
        {
          "type": "string",
          "enum": [
            "stop",
            "length"
          ]
        },
        {
          "type": "null"
        }
      ],
      "title": "Finish Reason",
      "description": "Reason generation stopped (stop or length)"
    },
    "message": {
      "$ref": "#/components/schemas/ChatMessage-Output",
      "description": "Complete message (non-streaming)"
    },
    "delta": {
      "$ref": "#/components/schemas/ChatMessage-Output",
      "description": "Incremental message delta (streaming)"
    }
  },
  "type": "object",
  "required": [
    "index",
    "message",
    "delta"
  ]
}