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 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 - endoflife.date eolanthropic-models ·
Claude model claude-opus-4-1-20250805 reaches end of life in 24 days
Claude model claude-opus-4-1-20250805 reaches end of life on 2026-08-05 (24 days from now).
deprecation - 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 - Claude Platform Release Notes aigaengineer ·
Claude Platform Updates: New Sonnet 5, API Key Expiration, Agent Memory
Anthropic has released Claude Sonnet 5 with a 1M token context window and updated pricing, introducing significant behavioral changes and a new tokenizer for Sonnet 5. The Claude Platform now supports API key expiration in the Console, enhancing security for administrators. Additionally, updates to agent memory handling and SDKs improve developer experience and tool integration across various models.
feature patch deprecation - 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 Platform Release Notes aigaengineer ·
Claude Platform Updates: API Keys, New Models, and Tooling Enhancements
Anthropic has released updates to the Claude Platform, including new model versions like Claude Sonnet 5, Fable 5, and Mythos 5, and enhanced tooling for API keys and managed agents. These changes offer improved context windows, adaptive thinking, and more granular control over agent behavior and security. The updates affect developers building applications with Claude models, providing new capabilities and requiring some migration steps for certain features.
feature patch deprecation announcement - 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 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 - Claude Platform Release Notes ai ·
Claude Platform Updates: New Models, Features, and Deprecations in July 2026
Anthropic has released Claude Sonnet 5, Claude Fable 5, and Claude Mythos 5, featuring expanded context windows and updated tokenizers, impacting prompt token counts. Several enhancements to Claude Managed Agents improve session event streaming, pagination, and configuration overrides. The platform also introduced new tool versions for code execution and web search, alongside API and SDK updates, while deprecating older Opus and Sonnet models and fast mode for certain versions.
feature patch deprecation - Claude Platform Release Notes aigapreviewengineer ·
Claude Platform Updates: New Models, Rate Limits, and SDK Enhancements
Anthropic has released Claude Sonnet 5 and Claude Fable 5, introducing new pricing and a 1M token context window. Rate limits have been standardized across models, and several older models are retired. The release also includes SDK updates, new tool capabilities, and enhancements to managed agents, affecting developers and architects working with the Claude API.
feature deprecation patch - Claude Platform Release Notes aigadeprecationengineer ·
Claude Sonnet 5 Launched with 1M Token Context, New Tokenizer
Anthropic has launched Claude Sonnet 5, featuring a 1 million token context window and a new tokenizer that increases token count by approximately 30%. This release impacts users migrating from Sonnet 4.6 due to changes in adaptive thinking and the removal of manual extended thinking. Sonnet 5 is available at introductory pricing until August 31, 2026, with Priority Tier support not included.
feature deprecation patch - 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
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.