Anthropic Releases
Anthropic news, Claude releases and SDK updates. New features, breaking changes, security advisories and deprecations - each summarised in plain English and updated continuously.
Tracking 218 Anthropic releases · Updated
- Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK for Python v0.120.2 Patch Release
This patch release for the Anthropic SDK for Python updates the Message Content Proxy (MCP) to support version 2 of the MCP SDK alongside version 1. This addresses compatibility issues for users leveraging different MCP versions. The update is now available for all users of the Python SDK.
patch - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK for Python v0.120.1 includes dependency fix
The latest patch release for the Anthropic SDK for Python, version 0.120.1, addresses a dependency issue by pinning the 'mcp' extra to a version less than 2. This fix is relevant for users relying on the 'mcp' functionality within the SDK and aims to prevent potential conflicts or regressions caused by the dependency.
patch - Claude Code Releases sdkai ·
Claude Code v2.1.220: Bug fixes and reliability improvements
Claude Code version 2.1.220 introduces bug fixes and reliability enhancements to the code generation model. These updates aim to improve the overall performance and stability of the tool for users. This is a patch release focusing on internal improvements without new features.
patch - Claude Code Releases sdkai ·
Claude-Code v2.1.219: Opus 5 default, stricter sandbox, nested subagents
Claude-Code version 2.1.219 updates the default Opus model to Claude Opus 5, offering a 1M context window and a faster mode. New sandboxing features enhance security by strictly allowing hosts, and subagent nesting is deepened to depth 3, benefiting complex workflow execution. These changes primarily impact developers and architects working with Anthropic's Claude models and require attention to updated security settings and workflow design.
feature patch - Anthropic Python SDK Releases sdkai ·
Anthropic SDK for Python adds Claude Opus 5, tool handling
Anthropic's Python SDK has been updated to version 0.120.0, introducing support for the new Claude Opus 5 model. This release also enhances API capabilities with new features for tool addition and removal, along with tool change event handling. Additionally, it expands client-side fallback credit token types and introduces a server-side fallback default option, impacting developers utilizing these advanced AI models.
feature - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.119.0 adds new stop reason, improves tool handling
Anthropic's Python SDK version 0.119.0 introduces a new stop reason for API responses, 'model_context_window_exceeded', enhancing error handling for developers. Additionally, it includes a bug fix for the agent toolset, enabling it to correctly handle binary files during read and edit operations. This update is relevant for developers using the Anthropic SDK in Python for their AI applications.
feature patch - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.218: Background Agents, Screen Reader & Path Fixes
This release for Claude Code v2.1.218 introduces significant improvements by migrating the `/code-review` function to a background subagent, preventing conversation filling and improving command stacking. It also enhances accessibility with screen reader announcements for text deletions and fixes critical bugs like Windows path corruption and arrow key interactions. These changes benefit developers using Claude Code, especially those who rely on screen readers or encounter specific path and interaction issues.
patch - Anthropic Python SDK Releases sdkaiengineermedia ·
Anthropic SDK Python Adds Managed Agents and Streaming Support
The Anthropic SDK for Python has been updated to version 0.118.0, introducing support for Managed Agents, initial session events, and threads delta streaming. This enhancement allows developers to leverage more advanced capabilities within the Anthropic API. The update is available now for all users of the Python SDK.
feature - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK Python 0.117.1: Bug Fixes and Chore Updates
The Anthropic SDK for Python has been updated to version 0.117.1, addressing an issue with AWS credential handling in the AnthropicAWS.copy() method. This patch also includes updates for API refusal categories, documentation, and dependency management. These changes are primarily relevant to developers using the Python SDK, particularly those integrating with AWS services.
patch - Claude Code Releases sdkaipreviewengineer ·
Claude Code v2.1.217: Emoji Autocomplete, Improved Session Handling, and Bug Fixes
Claude Code v2.1.217 introduces emoji shortcode autocomplete in the prompt input for easier emoji insertion, and adds warnings for transcript write failures or disabled session saving. It addresses several memory leaks, Windows update issues, and session isolation problems, enhancing stability for developers using the tool. This patch aims to improve user experience and reliability, particularly for those on Windows or dealing with complex session configurations.
patch feature - Claude Code Releases sdkaiengineer ·
Claude-Code v2.1.216: Filesystem isolation, performance, and bug fixes
Claude-Code v2.1.216 introduces a new setting to disable filesystem isolation, enhancing flexibility for developers. This release also addresses critical performance regressions in long sessions and resolves numerous bugs affecting command execution, session resumes, and cross-platform compatibility. These fixes are crucial for maintaining stable and efficient development workflows for users interacting with Claude for code-related tasks.
patch feature - Claude Code Releases sdkaiengineer ·
Claude Code Assistant requires explicit skill invocation
Claude Code Assistant in version 2.1.215 no longer automatically runs the `/verify` and `/code-review` skills. Engineers must now explicitly invoke these skills using their respective slash commands when desired. This change affects users interacting with Claude for code verification and review tasks, requiring a minor workflow adjustment.
patch - Claude Code Releases sdkaiengineermedia ·
Claude Code v2.1.214: Security, Permissions, and Stability Fixes
This release of Claude Code addresses numerous permission and security vulnerabilities, particularly in Bash and PowerShell environments, preventing potential unauthorized access and crashes. It also enhances stability with fixes for memory growth, proxy issues, and background session management. New features include an EndConversation tool and improved observability for tool calls. The updates affect developers using Claude Code, especially those on Windows or dealing with complex Bash scripting and remote sessions.
patch security - Claude Code Releases sdkaideprecationengineermediaenergy ·
Claude Code v2.1.212: New /fork behavior, background tasks, and fixes
This update for Claude Code introduces a new behavior for `/fork`, copying conversations to background sessions while users continue working. It also adds features like automatic mode reset, session limits for web searches and subagent spawns, and background processing for long-running MCP tool calls. Numerous bug fixes address issues with plan mode, worktree creation, tool failures, and UI elements, improving overall stability and user experience for engineers interacting with code.
patch - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.117.0 Adds Dreaming and MCP Tunnels Support
Anthropic's Python SDK has been updated to version 0.117.0, introducing support for the 'dreaming' feature and MCP Tunnels. This release also includes a bug fix to enhance credential security by keeping sensitive material out of traceback frames. The update is relevant for developers using the Python SDK to integrate with Anthropic's AI models, with new features available now.
feature patch - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.211: New flags, numerous bug fixes, and enhancements
This patch release for Claude Code introduces a new flag and environment variable to include subagent thinking in stream-json output. It addresses a wide range of bugs, including issues with permission previews, auto mode, session management, and file upload validation. Enhancements include improved terminal performance, more accurate background agent result reporting, and support for scientific notation in environment variables, benefiting developers and engineers using Claude Code.
patch - Claude Code Releases sdk ·
Claude Code v2.1.210: Elapsed Time Counter, Permission Warnings, and Fixes
Claude Code version 2.1.210 introduces a live elapsed-time counter for long-running tool calls, providing better visibility into progress. It also adds startup warnings for specific permission rules and resolves numerous bugs related to Git operations, plugin behavior, and UI rendering. This update aims to improve the user experience and stability for developers using Claude Code for code generation and editing tasks.
patch - Claude Code Releases sdkaiengineer ·
Claude Agents background sessions fixed
A fix has been deployed to address an issue where models and dialogs were blocked in Claude Agents background sessions. This reverts an overly broad guardrail that was inadvertently causing problems. The update ensures smoother operation for users running background agent tasks.
patch - Claude Code Releases sdkaimedia ·
Claude Code 2.1.208: Screen Reader Mode, Vim Remaps, and Numerous Fixes
Claude Code version 2.1.208 introduces an opt-in screen reader mode for improved accessibility and adds a new setting for Vim insert mode key remapping. This update also includes significant bug fixes across various functionalities, such as session saving, context window handling, and tool execution. These improvements are relevant to all users of Claude Code, particularly those relying on screen readers or advanced Vim configurations.
patch feature - Claude Code Releases sdkaimedia ·
Claude Code v2.1.207: Auto Mode, Bug Fixes, and Security Improvements
Version 2.1.207 of Claude Code introduces auto mode availability on major cloud platforms without opt-in, enhancing user workflow. This release also addresses numerous bugs, including issues with terminal responsiveness, consent dialogs, update processes, and file handling, ensuring a more stable and secure experience. Notably, it fixes security vulnerabilities related to prompt injection and shell injection for plugin developers. These updates benefit all users of Claude Code, particularly those leveraging cloud integrations and developing custom plugins.
patch security
About Anthropic release tracking on ReleaseBytes
Anthropic ships Claude model releases, API updates and SDK versions on a rapid cadence. ReleaseBytes tracks the official Anthropic announcement channels and SDK changelogs, summarising each release and flagging model deprecations and breaking changes so teams building on Claude stay ahead of them.
Frequently asked questions
How often are Anthropic release notes updated on ReleaseBytes? ›
Continuously. ReleaseBytes monitors the official Anthropic release channels around the clock and publishes a plain-English summary of each announcement shortly after it lands.
What kinds of Anthropic changes does ReleaseBytes track? ›
New features, enhancements, bug fixes, security advisories, breaking changes, deprecations and end-of-life announcements. Every item is tagged by type so you can filter to just the changes that need action.
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Set up a free email or Slack alert filtered to Anthropic, subscribe to the weekly digest, or follow the RSS feed. Teams can also install the ReleaseBytes GitHub App or connect via MCP.
Where does the Anthropic release data come from? ›
From the official sources: Anthropic news, Claude releases and SDK updates. Every item links back to the original vendor announcement.