# Anthropic Python SDK v1.3.0

Category: model-behavior
Published: 2026-09-01T17:36:55Z
Source: [Anthropic Python SDK releases](https://github.com/anthropics/anthropic-sdk-python/releases/tag/v1.3.0)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-22T00:17:18.355Z
Tags: anthropic, sdk, python

## Human Summary
Anthropic Python SDK v1.3.0 updates user profile beta APIs, adds organization compliance settings, updates memory-store/toolset schemas, and fixes AWS base URL resolution and batch response wrappers.

## Agent Summary
Anthropic Python SDK v1.3.0 brings API schema updates including beta user profile field changes (external user onboarded at added, relationship replaced by access type), memory-store and toolset updates, and organization compliance settings. It also fixes AWS base URL resolution when skipping auth, adds results to GA raw/streaming batch wrappers, and refactors discriminated unions.

## Body
Anthropic has released version 1.3.0 of its Python SDK. Key updates include additions and modifications to the beta user profiles API (adding external user onboarded at and removing relationship in favor of access type ), support for organization compliance settings, user-profile ordering, and updates to schemas for memory stores and toolsets. Bug fixes include resolving the base URL from AWS regions when skipping auth and passing options, attaching results to GA raw/streaming response wrappers for batches, properly deriving multipart filenames for file tuples, and removing unused wire aliases. Internal changes include dropping the unused distro dependency and refactoring discriminated union types to use UnionDiscriminator .

## Recommended actions
- Review usage of beta user profile APIs to accommodate the removal of 'relationship' in favor of 'access type' and the addition of 'external user onboarded at'.
- Update memory-store and toolset integrations to match newly updated schemas.
- Verify AWS client implementations if relying on region base URL resolution with skip auth.
- Upgrade the 'anthropic' Python package to v1.3.0.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.