{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/StreamChoice",
  "title": "StreamChoice",
  "type": "object",
  "properties": {
    "index": {
      "type": "integer"
    },
    "delta": {
      "$ref": "#/components/schemas/Message"
    },
    "finish_reason": {
      "type": [
        "string",
        "null"
      ],
      "enum": [
        "stop",
        "length",
        "tool_calls",
        "model_length",
        null
      ]
    }
  }
}