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 241 Anthropic releases · Updated
- Claude Code Releases sdkaiengineer ·
Claude Code Patch Fixes MCP OAuth Sign-In Issue
This patch for Claude Code v2.1.231 addresses a critical bug affecting OAuth sign-in. The issue involved a redirect URI mismatch, which prevented successful authentication for servers using pre-registered OAuth clients. This fix ensures that users can now seamlessly sign into Claude Code, particularly those integrating with platforms like Slack.
patch - Claude Code Releases sdkaigaengineermedia ·
Claude Code v2.1.229 Delivers Stability Fixes and Developer Workflow Improvements
Anthropic has released Claude Code v2.1.229, an update focusing on enhancing stability, improving developer workflows, and fixing numerous bugs. This release brings better support for self-hosted runners, documented remote-control sessions, and more robust streaming responses to prevent disconnects. Key fixes address issues like disappearing long responses, various crashes related to tool calls and terminal rendering, and errors with file paths. Developers also benefit from plugin marketplace command sources and new VSCode integration features like resizable side panels and session groups.
feature patch - endoflife.date eolclaude ·
Anthropic Claude claude-sonnet-4-5-20250929 reaches end of life in 49 days
Anthropic Claude claude-sonnet-4-5-20250929 reaches end of life on 2026-09-29 (49 days from now).
deprecation - endoflife.date eolclaude ·
Anthropic Claude claude-haiku-4-5-20251001 reaches end of life in 65 days
Anthropic Claude claude-haiku-4-5-20251001 reaches end of life on 2026-10-15 (65 days from now).
deprecation - Claude Code Releases sdkaigaengineer ·
Claude Code v2.1.228: Bug Fixes and Improvements
Claude Code v2.1.228 delivers a series of bug fixes and minor enhancements addressing various aspects of the coding assistant. These updates improve stability for interactive sessions, enhance self-hosted runner reliability, and harden the security of skills synced from claude.ai. Users will experience better cross-session messaging, more robust Vertex AI credential handling, and corrected `git` detection on Windows, ensuring a more consistent and secure development experience.
patch - Claude Platform Release Notes aigaengineer ·
Anthropic Claude Platform Updates: Opus 5, Agent Enhancements, & Deprecations
Anthropic has released extensive updates to the Claude Platform, API, SDKs, and Console throughout August 2026. Key changes include the launch of Claude Opus 5 with a 1M token context window and new effort controls, alongside significant enhancements for Claude Managed Agents such as session budgets, advisor models, and inference geo control. The Compliance API has been expanded with new session transcript capabilities for Enterprise organizations, and several features like Claude Opus 4.1 and the legacy Workbench are being retired. These updates provide developers with more powerful models, greater control over agent behavior, and improved compliance tools.
feature breaking deprecation - Claude Platform Release Notes aipreviewengineer ·
Anthropic Updates Claude Platform with Opus 5, Managed Agents Features, and Enterprise Tools
Anthropic has launched Claude Opus 5, featuring a 1M token context window and significantly enhanced capabilities for developers. The platform also gained new features for Claude Managed Agents, including session budgets, advisors, and data residency controls, alongside significant updates to enterprise compliance and security tools like Inference Hooks and an expanded Compliance API. These updates enhance model performance and control for developers, provide robust management and auditing capabilities for enterprise users, and expand the flexibility of agent-based applications. Opus 5 also introduces a breaking change regarding disabling its "thinking" feature at higher effort levels, and the company adjusted Claude Sonnet 5 pricing while deprecating older models and the legacy Workbench.
feature breaking deprecation announcement - Claude Platform Release Notes governancepreviewengineer ·
Claude Compliance API Adds Local Cowork and Code Session Transcripts
The Claude Platform's Compliance API now provides access to transcripts from Cowork and Claude Code sessions executed on users' local machines. This beta feature, available for Claude Enterprise organizations, enhances oversight and policy enforcement for AI tool usage. Access requires an existing Compliance Access Key and the `read:compliance_user_data` scope, utilizing new dedicated API endpoints.
feature announcement - Claude Code Releases sdkaigaengineer ·
Anthropic Claude-code v2.1.227 Patches Bugs and Boosts Performance
Anthropic has released version 2.1.227 of Claude-code, delivering critical bug fixes and performance enhancements. This update resolves an issue where feature flags were incorrectly evaluated for Max plan users, potentially leading to incorrect prompts for usage credits in Fable. It also rectifies failures with Bash commands under `claude-code-action` on GitHub-hosted runners and fixes a TUI conversation history bug. Furthermore, the release refines the slash-command menu's visual cues and reduces event-loop stalls related to file suggestions and at-mention checks for a more responsive user experience.
patch - Claude Code Releases sdkaiengineer ·
Claude-Code v2.1.226: Bug fixes and reliability improvements
Anthropic has released Claude-Code version 2.1.226, focusing on bug fixes and reliability enhancements. This update addresses underlying issues to improve the performance and stability of the coding assistant. Users can expect a more dependable experience with the latest version.
patch - Claude Code Releases sdkai ·
Claude Code 2.1.225: Gateway spend limits, workspace trust, and bug fixes
This update for Claude Code adds gateway spend limit support to usage warnings, displaying the cap, reset time, and operator message. It also introduces a workspace trust prompt for `claude agents` and resolves several bugs, including issues with OAuth tokens, session handling, and message display across different clients. These changes primarily affect users of Claude Code, especially those managing usage limits or working with remote sessions.
patch feature - Claude Platform Release Notes aigaengineer ·
Claude Platform Enhancements for Managed Agents
Anthropic's Claude Platform has introduced several enhancements to its Managed Agents service. New features include budget controls for agent sessions to cap spending, advisory models for mid-turn strategic guidance, and configurable inference geolocations for data residency. Additionally, agents can now load skills directly from GitHub repositories, improving modularity and development workflow for complex agent deployments.
feature - Anthropic Python SDK Releases sdkaipreview ·
Anthropic SDK Python v0.121.0: New API features and model updates
The Anthropic SDK for Python has been updated to version 0.121.0, introducing new API capabilities such as mid-conversation tool changes and support for session budgets. This release also includes the removal of retired Claude Opus models and documentation enhancements. These changes are primarily for developers using the Anthropic API with Python, with some features marked as beta or requiring specific attention to model availability.
feature patch - Claude Code Releases sdkaiengineer ·
Claude Code Adds Self-Hosted Environments, Plugin Enhancements
Claude Code v2.1.224 introduces self-hosted environments for Team and Enterprise users, allowing custom machines to run sessions. New features include an `archive` plugin source for easier installation and enhanced cross-session communication capabilities. These updates benefit developers and teams using Claude Code, particularly those requiring more control over their execution environment or needing to integrate plugins more flexibly.
feature patch - Anthropic News aiengineerhealthcare ·
Anthropic reduces Fable 5 biology safeguards false positives
Anthropic has updated Fable 5's biology safeguards to significantly reduce false positives, decreasing biology-related model fallbacks by approximately 85%. This enhancement allows Fable 5 to assist with a broader range of everyday health and educational biology queries and provides more support for healthcare professionals on clinical tasks. While still blocking professional biology research and drug development due to dual-use risks, these improvements aim to widen access to Fable 5's capabilities.
patch feature - Claude Release Notes aipreviewengineer ·
Anthropic Adds Beta Security Scanning for Skills and Plugins
Anthropic is introducing beta security scanning for third-party skills and plugins on enterprise plans. This feature automatically checks for malicious content when skills or plugins are uploaded or edited, enhancing platform security. It is available now for enterprise customers, providing an automated layer of protection.
feature announcement - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.223: Enhancements and Fixes for Developers
This patch for Claude Code introduces several enhancements, including wildcard support for marketplace repositories and improved handling of restricted subagent models. Numerous bugs have been fixed, addressing permission bypasses, workflow script vulnerabilities, and issues with session resumption and model discovery. The release also refines context window management and provides new aliases and behaviors for code review commands, aiming to improve developer workflow and security.
patch feature breaking - Claude Platform Release Notes aipreviewengineer ·
Claude Platform Updates: New Models, Hooks, and SDK Enhancements
Anthropic has released Claude Opus 5 with a 1M token context window and updated pricing. Key features include new inference hooks for enterprise security, expanded support for Dreams research preview, and mid-conversation tool changes now in beta. These updates affect developers using the Claude API, SDKs, and Console, with some changes requiring migration for continued access to specific features.
feature patch deprecation - endoflife.date eolanthropic-models ·
Claude model claude-opus-4-1-20250805 has reached end of life
Claude model claude-opus-4-1-20250805 reached end of life on 2026-08-05. It no longer receives fixes or security updates — plan the upgrade now.
deprecation - Claude Code Releases sdkaiengineer ·
Claude Code Update Fixes Security and Usage Issues
This patch addresses several critical issues in Claude Code, including security vulnerabilities related to git command execution and tool use bypass. It also resolves bugs affecting usage reporting, proxy connectivity, and session linking to pull requests. These fixes benefit all users of Claude Code, particularly those on Team and Enterprise plans, by improving stability and security.
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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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.