# Structured output

Source: https://docs.getworg.com/structured-output

With response_format the reply is JSON: any valid JSON object, or one that follows a schema you send.

## Lanes

Both modes work on `deepseek-v4.1-flash:cached`, `deepseek-v4.1-flash:standard` and `qwen3.8-27b:standard`. In testing, each lane returned JSON even when the prompt asked for a poem.

## Follow a schema

cURL:

```bash
curl https://api.getworg.com/v1/chat/completions \
  -H "Authorization: Bearer $WORG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v4.1-flash:cached",
    "messages": [{"role": "user", "content": "Rate this review from 1 to 10: The delivery was late but the support team fixed it the same day."}],
    "response_format": {
      "type": "json_schema",
      "json_schema": {
        "name": "review_score",
        "strict": true,
        "schema": {
          "type": "object",
          "properties": {
            "score": {"type": "integer"},
            "sentiment": {"type": "string", "enum": ["negative", "mixed", "positive"]}
          },
          "required": ["score", "sentiment"],
          "additionalProperties": false
        }
      }
    },
    "reasoning_effort": "none",
    "max_tokens": 200
  }'
```

message.content:

```
{ "score": 7, "sentiment": "mixed" }
```

- Set `"strict": true`, list every property in `required`, and set `"additionalProperties": false`.
- The JSON is a string in `message.content`. Parse it in your code.

## Any JSON object

`{"type": "json_object"}` makes the reply valid JSON, but the model picks the keys. Name the keys you want in the prompt, or use a schema.

## Check in your code

- If `finish_reason` is `length`, the output was cut at `max_tokens` and the JSON is incomplete. Raise `max_tokens` and retry.
- Validate the parsed object against your schema before you store or act on it.
- Reasoning text, when on, comes in `reasoning_content`, not in `content`, so it does not break the JSON. Set `"reasoning_effort": "none"` when you only need the data.

Next: [Tool calling](https://docs.getworg.com/tool-calling) · [Reasoning](https://docs.getworg.com/reasoning)