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  • Overview
    • Introduction
    • How it works
    • Quickstart
    • Customer showcase
  • Working with SDKs
    • Project structure
    • Adding custom code
    • Capabilities
    • Fern Autorelease
  • Generators
  • Reference
    • generators.yml
GeneratorsPython

Changelog

October 23, 2025
October 23, 2025

4.31.2

(fix): Fix union type deserialization to properly match discriminated unions based on literal field values (e.g., type discriminators) when nested fields have validation errors.

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Slack communityLog inBook a demo