Anthropic SDK

This release stabilizes the files/skills namespaces by adopting GA shapes and dropping dated beta header pins. It also includes several bug fixes, notably for binary file uploads via AWS/Bedrock and preserving file bytes in toolsets.

This release introduces new API features including the 'updates' thinking display mode and support for Organization API endpoints. It also includes bug fixes for tool runner behavior and documentation links.

This release upgrades the client to httpx2, introducing minor breaking changes and bug fixes. Consult MIGRATION.md for detailed upgrade instructions.

Introduced new features for managed agents, including web search configuration and self-hosted sandbox memory.

This release makes the Files and Skills APIs generally available and introduces new toolsets for computer and browser use.

This release introduces new features for file and memory store management, along with improvements to client headers and error handling. It also includes several bug fixes, such as retrying tool-result sends and running synchronous session tools in a worker thread.

This release introduces `output_behavior` for dream creation and includes numerous bug fixes across API clients, streaming, and tool handling. It also refactors the use of the `NOT_GIVEN` alias to the `not_given` singleton.

This release introduces the `mid-conversation-tool-changes-2026-07-01` beta API and adds support for session budgets, advisor tool, pinned inference location, and skills auto-loading from GitHub. It also removes retired Claude Opus 4.1 models.

This release includes a bug fix to support MCP SDK v2 alongside v1. The changelog provides a link to the full comparison between versions.

This patch release addresses a bug by pinning the 'mcp' extra to a version less than 2, ensuring better dependency management.

This release introduces the new claude-opus-5 model, enhances tool management with addition/removal blocks and tool_change events, and expands credit token handling with client-side fallbacks and server-side defaults.

This release introduces a new stop reason for exceeding the model's context window and fixes an issue with handling binary files in the agent toolset.

This release introduces new API capabilities including support for Managed Agents model effort, initial session events, and threads delta streaming.

This release includes a bug fix for AWS credential handling and several dependency updates and documentation improvements.

This release introduces support for dreaming and MCP Tunnels, and includes a bug fix to improve credential security in tracebacks.

This release introduces support for the new agent-memory-2026-07-22 beta API header.

This patch release primarily focuses on maintenance by removing some nonfunctional types from the SDKs.

This release introduces significant new API capabilities, including support for Managed Agents event delta streaming, agent overrides, reverse pagination, and webhook events.

This release introduces support for the new claude-sonnet-5 model and fixes a bug related to absolute path handling in the agent toolset.

This release introduces support for the 20260318 web fetch API and tools, alongside a fix for an async count_tokens issue.

This release introduces support for streaming system.message events and fixes a bug related to directory permissions in the memory tool.

Release 0.111.0 introduces a new feature for tagging refusal-fallback middleware requests within the helpers module.

Version 0.110.0 introduces support for the new code_execution_20260120 tool and includes several fixes related to header merging and Bedrock streaming.

This patch release primarily involved chore updates, specifically removing retired models from the API and SDKs.

This patch release primarily addresses an API update by adding support for the new `frontier_llm` refusal category.