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Label Studio SDK 2.0.0: Your Migration Guide

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In August 2025, we officially launched Label Studio SDK 2.0.0, a milestone release bringing a number of key improvements across documentation, functionality, and developer experience.

This blog post serves as your migration guide: upgrade instructions, key enhancements, breaking changes, and next steps.

What’s New in SDK 2.0.0

Enterprise-Only Enhancements

  • projects.stats.iaa endpoint: now returns inter-annotator agreement matrix stats.
  • Update tasks with comments: tasks that include comments can now be updated.
  • Support for S3s (S3 with IAM roles): sync your exports to S3 more securely using IAM roles.

Features for All Users (Open Source & Enterprise)

  • Expanded support for project settings: including assignment_settings, review_settings, annotator_evaluation, and more.
  • actions.list() bug fixed: passing the project parameter now works correctly.
  • Relaxed validation: fewer Pydantic errors thanks to more lenient request/response validation.

All parameters are now fully listed and easier to reference. See the updated docs here.

Breaking Changes to Watch For

These updates may affect your existing scripts or integrations:

Enterprise-Only Changes

  • comments.create no longer accepts a project argument.
  • prompts.indicators: parameter pk is now id.
  • prompts.runs and prompts.versions: parameter id is now prompt_id.
  • workspaces.members.list now returns objects instead of dictionaries.
  • New billing.info endpoint for billing checks and feature flags.
  • New organizations.memberships.list endpoint to view org memberships and roles.
  • New organizations.memberships.update endpoint to update org user memberships or roles.

Changes Across All Editions

  • projects.exports now requires the project ID as id, and the export ID as export_pk.
  • Predictions included in task responses are now objects instead of dictionaries.

How to Upgrade

  1. Run: pip install --upgrade label-studio-sdk
  2. Review the breaking changes above and adjust any impacted scripts.
  3. For full details and complete release notes, see our official documentation.

SDK 1 will continue to work reliably until you’re ready to make the switch.

Why Now?

Upgrading ensures you're using a more resilient, feature-complete SDK that’s automatically aligned with the Label Studio API through OpenAPI-generated SDKs, unlocking faster access to new features and a smoother development experience.