Anthropic SDK Python v0.121.0: New API features and model updates
sdkaipreview
feature patch
The Anthropic SDK for Python has been updated to version 0.121.0, introducing new API capabilities such as mid-conversation tool changes and support for session budgets. This release also includes the removal of retired Claude Opus models and documentation enhancements. These changes are primarily for developers using the Anthropic API with Python, with some features marked as beta or requiring specific attention to model availability.
- →add mid-conversation-tool-changes-2026-07-01 beta
- →add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub
- →remove retired Claude Opus 4.1 models
- →small updates to descriptions
- →updates to a few documentation strings
Features (2) ›
- api add mid-conversation-tool-changes-2026-07-01 beta
- api add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub
Read the original announcement →
https://github.com/anthropics/anthropic-sdk-python/releases/tag/v0.121.0
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