Beta API now supports mid-conversation tool changes. GitHub skills auto-loading makes integrations smoother
Anthropic SDK Python v0.121.0: Tool management, session budgets, and GitHub skills auto-loading
Original: anthropics/anthropic-sdk-python: v0.121.0
Importance: SDK の小機能追加とメンテナンス更新；既存実装への直接影響は限定的だが、古いモデル削除と依存関係変更には注意が必要
Summary
Anthropic Python SDK v0.121.0 released with new beta support for mid-conversation tool changes (mid-conversation-tool-changes-2026-07-01), session budgets, advisor tool, pinned inference location, and automatic skills loading from GitHub. Retired Claude Opus 4.1 models removed; all dependencies now have major version constraints.
Key Points
- New beta API for mid-conversation tool changes
- Session budgets, advisor tool, pinned inference location
- GitHub skills auto-loading for streamlined integration
- Claude Opus 4.1 models retired; compatibility check needed
- All dependencies enforce major version constraints
View developer notes (APIs, breaking changes, migration)
SDK v0.121.0 introduces beta API mid-conversation-tool-changes-2026-07-01 for dynamic tool modifications mid-conversation. Session budgets enable token spend management. Pinned inference location reduces latency. GitHub skills auto-loading simplifies tool integration. Claude Opus 4.1 models removed — check model strings for compatibility. All dependencies now enforce major version constraints to prevent unexpected upgrades.
Source: https://github.com/anthropics/anthropic-sdk-python/releases/tag/v0.121.0
Outlet: SDK (anthropic-sdk-python)
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