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
- Claude Code Releases sdkaigaengineer ·
Claude Code v2.1.206: Enhanced Commands and Agent Upgrades
Claude Code v2.1.206 introduces directory path suggestions for `/cd`, a `/doctor` check to trim `CLAUDE.md` files, and improved `/commit-push-pr` functionality. These updates enhance developer workflow and agent management, with background agents now upgrading seamlessly post-Claude Code updates. The release also addresses numerous bugs, including login failures and input responsiveness issues across various commands and server configurations.
patch - Claude Code Releases sdkaipreviewengineer ·
Claude Code v2.1.205: Bug fixes and usability improvements
This release of Claude Code, version 2.1.205, addresses numerous bugs and introduces several usability enhancements for its AI coding assistant. Key fixes include preventing silent data loss during agent interactions, resolving issues with file handling on Windows, and improving the reliability of background agent operations. The update also enhances the agent view with clearer status indicators and adds a diagnostic tool. These changes benefit developers and architects using Claude Code for coding assistance, aiming for a more stable and informative user experience.
patch - Claude Code Releases sdkaiengineermedia ·
Claude-Code v2.1.204: Fixes hook event streaming in headless sessions
Version 2.1.204 of Claude-Code resolves an issue where hook events failed to stream during SessionStart in headless sessions. This prevented remote workers from being prematurely idled. The fix ensures proper event propagation for headless operation.
patch - Claude Code Releases sdkaipreviewengineer ·
Claude Code v2.1.203: Session Recovery and UI Improvements
This update to Claude Code addresses numerous bugs related to background session stability and responsiveness, particularly on macOS and Windows. It improves the user experience by adding warnings for expiring logins, clearer visibility of active modes, and better recovery from session staleness. The release affects developers using Claude Code for coding assistance, especially those working with background agents or on macOS.
patch feature - Claude Code Releases sdkai ·
Claude-Code v2.1.202: Dynamic workflows, OpenTelemetry, and bug fixes
This update introduces a "Dynamic workflow size" setting to control agent count and adds OpenTelemetry attributes for better workflow tracing. Several bugs affecting session management, remote control, workflow parsing, and voice dictation have been fixed. These changes benefit users working with complex workflows, distributed tracing, and those encountering specific session or input issues.
patch - Claude Code Releases sdkaiengineer ·
Claude Sonnet 5 system role change for harness reminders
Claude Sonnet 5 sessions will no longer use the mid-conversation system role for harness reminders. This change impacts users who rely on this specific system role for reminder functionality. The update ensures cleaner and more direct communication within the API.
patch - Claude Code Releases sdkai ·
Claude Code v2.1.200: Dialogs, permissions, and background agent fixes
Claude Code v2.1.200 updates `AskUserQuestion` dialogs to require explicit opt-in for auto-continuation and changes the default permission mode to "Manual" across all interfaces for enhanced control. Several critical bugs affecting background session stability, agent startup, and data corruption have been resolved, ensuring more reliable agent operation. Additionally, improvements to UI rendering, accessibility, and the installation process are included for a smoother user experience.
patch - Claude Code Releases sdkaimedia ·
Claude Code v2.1.199: Improved error handling and agent stability
This release addresses several stability and error handling issues within Claude Code, particularly concerning background agents and subagent interactions. It improves how stacked skill invocations are handled and ensures partial responses are preserved during server errors. These fixes benefit developers using Claude Code, especially those running complex agent workflows or experiencing transient API issues.
patch - Anthropic Python SDK Releases sdkaipreviewengineer ·
Anthropic SDK Python v0.116.0 Adds Agent Memory Beta Header
Anthropic's Python SDK has been updated to version 0.116.0, introducing a beta header for agent memory features. This change signals upcoming capabilities for developers working with AI agents and memory management within the Anthropic ecosystem. The update is available now for users of the Python SDK.
feature - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.115.1
Anthropic has released version 0.115.1 of its Python SDK. This patch primarily involves chore updates, specifically the removal of non-functional types from the SDKs. The update is available now and affects developers using the Python SDK.
patch - Claude Code Releases sdkaigaengineer ·
Claude in Chrome, Background Agents, and New Skills Go GA
Claude in Chrome is now generally available, bringing enhanced background agent notifications and new skills like `/dataviz` for chart design. Background agents have improved Git integration, committing and opening draft PRs upon completion. These updates are available to all users, with several fixes addressing session stability, UI rendering, and agent behavior across web, desktop, and VS Code environments.
feature patch - Anthropic Python SDK Releases sdkaiengineermedia ·
Anthropic SDK for Python v0.115.0 Adds Agent and Managed Agent Features
Anthropic has released SDK for Python v0.115.0, introducing several new features for agents and managed agents. These enhancements include support for event delta streaming, agent overrides, reverse pagination, and credential injection scoping. The update also adds webhook events for agents and deployments, providing greater control and flexibility for developers integrating AI agents.
feature - Claude Code Releases sdkaiengineer ·
Claude Code updates default model to Sonnet 5
Claude Code has updated its default model to Claude Sonnet 5 in version 2.1.197. This change introduces a native 1 million token context window and offers promotional pricing through August 31st. Users can update to access these improvements.
feature announcement - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK Python v0.114.0 adds Sonnet 5 API support
Anthropic's Python SDK has been updated to version 0.114.0, introducing support for the Claude-Sonnet-5 model API. This release also fixes an issue with agent toolsets allowing absolute paths within the working directory. The update is available now for users of the Python SDK.
feature patch - Claude Code Releases sdkaiengineermedia ·
Claude Code v2.1.196: Organization defaults, better session management, and security
This release introduces organization-level default model settings for admins and improves session management with readable names and clickable attachments. Security is enhanced by preventing untrusted workspaces from auto-approving configurations. These updates benefit all users, especially administrators managing shared environments, by improving usability and security posture.
patch security - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.113.0 adds web fetch and tool support
The Anthropic SDK for Python has been updated to version 0.113.0, introducing support for the 2026-03-18 API version, including web fetching and tool usage capabilities. This release addresses a bug in async count_tokens and includes chore updates for token counting with user profiles and documentation. These enhancements are available to all users of the Python SDK.
feature patch - Claude Code Releases sdkai ·
Claude Code v2.1.195: Fixes for dictation, plugins, and background agents
This Claude Code update fixes several issues including incorrect hook matching, voice dictation problems on macOS and for non-spaced languages, and problems with external plugin installation and management. It also addresses bugs related to background agents and crashed task restarts, improving reliability for users on Linux and within the IDE's agent management interface. The release aims to provide a more stable and predictable experience for developers using Claude Code for coding assistance.
patch - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.193: New settings, improved background agents
This release introduces a new `autoMode.classifyAllShell` setting to enhance security by classifying all shell commands. It also adds auto-mode denial reasons to transcripts and toasts, and an OpenTelemetry log event for model responses. The update includes several improvements to background agents, fixes for UI and background task issues, and enhanced plugin and MCP authentication.
patch feature - Claude Code Releases sdkaimedia ·
Claude Code v2.1.191: Rewind support, fixes, and performance
This release adds support for resuming conversations with the new `/rewind` command and addresses several bugs affecting agent behavior, UI elements, and command-line interactions. Performance is improved with reduced CPU usage during streaming and better memory management. These updates are primarily for users of Claude Code and its agent functionalities.
patch feature - Anthropic Python SDK Releases sdkaimedia ·
Anthropic SDK Python v0.112.0: System message streaming, memory tool fixes
Anthropic's Python SDK has been updated to v0.112.0, introducing support for streaming system message events and fixing a bug in the memory tool related to directory creation. These updates enhance the SDK's capabilities for developers building with Anthropic's AI models. The release includes a new feature for system message streaming and several minor improvements. This update is available now for all users of the Python SDK.
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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.
How can I get alerts for new Anthropic releases? ›
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.