> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aurous-labs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# response_format_too_large

> The structured-output schema is larger than the platform's payload cap.

**Code**: `response_format_too_large`
**HTTP status**: `400`
**Type**: `invalid_request`

## When it fires

The JSON schema you passed in `response_format.json_schema` exceeds the platform's payload-size cap for structured-output schemas. Surfaced as a distinct code (vs `invalid_format`) so client tooling can branch on the right fix — you need to trim the schema, not the prompt.

## How to recover

Reduce the size of the schema: drop unused properties, shorten `description` strings, factor repeated subschemas into `$defs` references. If the schema is intrinsically large, consider breaking the workload into multiple smaller calls or using a function-call (tool) shape instead.