Anthropic SDK

Version 0.84.0 updates API serialization for arrays to use bracket notation and introduces new conversion helpers for MCP tools and prompts. The project documentation has also been rebranded to Claude SDK.

This release introduces top-level automatic caching control to the API settings. It also includes minor documentation updates for the mock server.

This release introduces fixes for shared UserLocation and error code types in the API, along with backward-compatibility aliases for previously removed nested UserLocation classes.

This release introduces new tool versions as top-level types within the API, enhancing tool usage capabilities.

Version 0.80.0 introduces the new claude-sonnet-4-6 model and includes several bug fixes, such as correcting API specification errors.

This release introduces the ability to enable fast-mode for claude-opus-4-6 via the API and fixes a bug related to passing the speed parameter in count_tokens.

Version 0.78.0 introduces manual updates to the API endpoints. This release focuses on keeping the SDK synchronized with the latest API specifications.

This patch release fixes an issue where the structured output beta header was not being sent correctly when the format was omitted. It also removes an obsolete workflow.

This release introduces support for Structured Outputs in the Messages API, migrating the configuration mechanism to use `output_config`. It also includes several bug fixes related to structured output headers and general client improvements.

This release introduces support for raw JSON schema in streaming messages, binary request streaming, and server-side tools. It also includes several bug fixes, notably loosening auth header validation and ensuring streams are closed.

This release introduces support for Claude Opus 4.5 along with advanced features including Computer Use v5, Autocompaction, and enhanced tool use capabilities.

This patch release fixes an issue with the beta header for structured outputs and updates model references in the examples.

This release introduces the Foundry SDK and includes bug fixes for cross-platform path handling and memory examples.

This release introduces beta support for structured outputs in the Anthropic API.

This release drops support for Python 3.8 and includes bug fixes for stream handling, Pydantic v1 compatibility, and Python 3.14 support.

This release introduces the ability to clear thinking within context management in the API.

This patch release fixes non-functional socket options in the client and updates internal model deprecation statuses and dependencies.

This release introduces support for agent skills within the Anthropic API.

This release introduces manual API updates and adds beta headers for context management and model context window exceeded features.

This release introduces support for the Claude Sonnet 4.5 model and adds new context management features to the API.

This patch release fixes a bug where headers with default values were incorrectly being set to omit.

This maintenance release focuses on internal type system updates, specifically transitioning optional parameter types from NotGiven to Omit, and cleaning up project dependency configurations.

This release introduces new tool running helpers and includes internal maintenance updates, specifically regarding Pydantic dependency management and test suite improvements.

This release introduces support for the web_fetch_20250910 tool and focuses on internal improvements for Pydantic v3 compatibility and beta type definitions.

This release introduces support for including Documents within tool results in the Anthropic Python SDK.

This release introduces support for the code-execution-2025-08-26 tool and updates type hints across parameters to use SequenceNotStr instead of List[str].

This release promotes 1-hour TTL Cache Control to general availability and deprecates older Claude 3.5 Sonnet model versions.

This release introduces support for the context-1m-2025-08-07 beta and includes internal maintenance updates for breaking change detection and testing.

This release introduces support for search result content blocks within the API.

This release introduces support for the Claude Opus 4-1 model, new text editor tools, and file upload capabilities.

This release adds missing beta methods to the Vertex AI integration and updates streaming error messages for better clarity on requirements.

Release 0.59.0 removes support for older deprecated models and improves response parsing for metadata and extra field types.

This is a maintenance release involving an internal version bump to v0.58.2.

This is a minor internal version bump release with no functional changes to the codebase.

This release introduces official support for Python 3.13 and includes bug fixes for GET request headers and nested union parsing.

This is a minor maintenance release that updates the BetaCitationSearchResultLocation API model and performs an internal version bump.

This release introduces support for Search Result Content Blocks and improves error messaging for network timeouts and stream processing.

This release introduces automatic AWS Region inference for Bedrock and support for global region endpoints in Vertex AI, alongside several CI and test suite improvements.

This release introduces support for aiohttp and includes several API updates, alongside bug fixes for binary response parsing and test suite improvements.

This release introduces support for fine-grained tool streaming and resolves a conflict between default transport and proxy settings in the httpx client.

This release introduces support for the text_editor_20250429 tool and a new follow_redirects option, while deprecating BetaBase64PDFBlock in favor of BetaRequestDocumentBlock.

This patch release fixes an issue with server_tool_use input tracking and transitions the internal package management from rye to uv.

This patch release focuses on fixing a broken asset in the examples and providing new documentation on MCP server authorization.

This release introduces support for Claude 4 models along with major new capabilities including a Files API, code execution tools, and MCP connectors.

This release introduces web search capabilities to the Claude API and includes bug fixes for Pydantic v1 integration and socket handling.

Release 0.50.0 introduces schema changes for ContentBlockDelta events, improves performance by optimizing hot paths, and bumps the minimum httpx dependency to 0.25.0.

This release introduces the ability to disable tool calls in the API and includes updates to client docstrings and documentation URLs.

This release introduces support for URL source blocks for images and PDFs in the API, along with new documentation examples for thinking.

This release fixes a bug in the beta streaming interface to include thinking blocks and includes internal Pydantic configuration improvements.

This patch release includes internal specification updates and improves the error messaging for large max_tokens values.

This release introduces support for the Claude 3.7 model and its new thinking capabilities, along with improved error handling and more flexible request body parameters.

Release 0.46.0 introduces a .close() method for JSONL handling, optimized pagination, and fixes for async execution on non-asyncio runtimes.

This patch release fixes a deserialization error encountered during message streaming.

This patch release fixes a bug in the streaming functionality to ensure citations are correctly accumulated.

This release introduces support for citations in the API and adds a new results endpoint to the client.

This release introduces a request_id getter for streaming responses and deprecates several older models, alongside internal test improvements and style updates.

This patch release focuses on internal improvements, including better error messaging for streaming, enhanced type metadata, and documentation corrections.

This release introduces message batch deletion and beta streaming helpers, while cleaning up deprecated Vertex AI client options and improving stream handling internals.