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 Platform Release Notes aipreviewengineer ·
Claude Opus 5 Launched with 1M Token Context and Breaking Change
Anthropic has launched Claude Opus 5, a significant upgrade featuring a 1 million token context window, 128k max output tokens, and 'thinking' enabled by default. This update introduces a breaking change regarding the disabling of the 'thinking' parameter at higher effort levels. The new model is available via API and across major cloud platforms, with pricing unchanged from its predecessor.
feature breaking - Claude Platform Release Notes aipreviewmedia ·
Claude Managed Agents Updates: Effort Levels, Webhooks, and Session Seeding
Anthropic has enhanced Claude Managed Agents with new capabilities, including setting an effort level for agent models and expanded webhook event types for environment and memory store lifecycles. Users can now seed agent sessions with initial events, simplifying the start of agent loops. Additionally, updates to agent configurations are more flexible with an optional version field, and session thread event streams now support event deltas for previewing subagent output.
feature - 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 Platform Release Notes aipreview ·
Claude Platform Updates Include New API Features and Model Enhancements
Anthropic has released several updates to its Claude Platform, including new API capabilities for managing organizations and conversations, and enhancements to model features like context windows and memory management. These changes aim to improve developer control, user experience, and model performance for a wide range of users, from individual developers to enterprise organizations. Notable additions include mid-conversation system messages, an Admin API for user management, and a new Sonnet 5 model with expanded capabilities, some of which are currently in beta or preview.
feature patch deprecation announcement - Claude Platform Release Notes aipreviewengineer ·
Claude Enterprise Admin API Beta for User Management
Anthropic is releasing a beta version of the Admin API for Claude Enterprise, enabling organizations to manage users and roles programmatically. This feature allows for detailed control over membership, invitations, and custom roles, which is crucial for enterprise-level administration and security. It is available to all Claude Enterprise organizations with specific beta headers required for certain advanced functions.
feature announcement - Claude Platform Release Notes aipreviewengineer ·
Claude API Update: Agent Memory Listing Changes
Anthropic is introducing a new beta header, `agent-memory-2026-07-22`, for the List Memories endpoint, altering response ordering and parameter behavior. This change impacts how developers retrieve memory data and requires updates to SDK usage and explicit beta header configurations. The new header will eventually replace `managed-agents-2026-04-01` on July 22, 2026, and developers are advised to restart pagination when adopting it.
feature breaking announcement - Claude Release Notes aipreviewengineer ·
Claude Adds Monthly Usage Recap and Focus Tools
Anthropic introduced a new 'Monthly Recap' feature in Claude, providing insights into user activity and work patterns with the AI model. This feature aims to enhance user awareness and productivity by offering data on topics, active days, and peak hours. It is currently in beta for Free, Pro, and Max plan users on web and desktop versions, requiring memory to be enabled, and is complemented by new time management tools.
feature announcement - Anthropic News aipreviewengineer ·
Anthropic Beta: Claude Usage Reflection Dashboard
Anthropic has launched a beta feature allowing users to track and analyze their interaction patterns with Claude, aiming to improve AI integration into daily life. This reflection dashboard visualizes usage across key topics and task types, offering insights and interactive prompts to refine AI collaboration. It is available to Free, Pro, and Max users with Memory enabled, with specific privacy measures for sensitive conversations.
feature 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 Release Notes aipreviewengineer ·
Claude Cowork available on web and mobile
Claude Cowork is expanding to web and mobile platforms, complementing its existing desktop availability. This feature allows sessions and files to be saved to a user's Claude account, enabling access across devices and ensuring scheduled tasks run even when a device is offline. The rollout begins with the Max plan over the coming weeks, and all chat and Cowork features are now consolidated in a single location.
feature announcement - 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 - 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 - Claude Release Notes aipreviewengineer ·
Claude edits drafts in place within its workspace
Claude can now edit drafts directly within its chat or Claude Cowork interface, allowing users to highlight text and specify changes. This feature streamlines the editing process by eliminating the need to switch applications or re-explain content in chat prompts. The functionality is available now and further details can be found in the "Work with artifacts" documentation.
feature - Claude Release Notes aipreviewengineer ·
Anthropic Enterprise: Model Entitlements Beta
Anthropic's Enterprise plans now offer a beta feature for admins to control user access to specific models and effort level settings. This enhancement allows for greater organizational oversight of AI model usage and configuration. The feature is currently in beta and is available to administrators on Enterprise plans.
feature announcement - 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 aipreviewengineer ·
Claude SDKs add support for code execution tool version 20260120
The Python, TypeScript, Go, Java, Ruby, PHP, and C# SDKs now support the `code_execution_20260120` tool version. This update enhances tool usage by enabling REPL state persistence and is the minimum version required for programmatic tool calling. The feature is available on specific Claude model versions and requires setting the tool's type accordingly.
feature - Claude Code Releases sdkaipreviewengineermediaenergy ·
Claude Code v2.1.181: New config syntax, macOS fixes, improved UI
This patch for Claude Code introduces a new in-prompt configuration syntax and enhances user experience with improved streaming and auto-retry mechanisms. It also addresses several critical bugs, particularly on macOS, related to Apple Events and startup performance. Users interacting with Claude Code will benefit from these stability and usability improvements, with no specific version prerequisites.
patch - Claude Code Releases sdkaipreviewengineer ·
Claude Code v2.1.174: Scroll acceleration, model picker, and attribution fixes
This patch for Claude Code v2.1.174 addresses several issues including the '/model' picker display, usage attribution for enterprise accounts, and background session environment inheritance. It also introduces a new setting to disable mouse-wheel scroll acceleration in fullscreen mode. These fixes are available immediately for users of Claude Code.
patch - Claude Platform Release Notes aipreviewengineer ·
Claude Platform Updates: Code Execution and Web Tools Enhanced
Anthropic has updated its code execution, web search, and web fetch tools on the Claude platform. The code execution tool now explicitly states a 90-second time limit to better manage cell execution, while the web tools have added a response inclusion parameter to streamline agentic workflows. These updates aim to improve the predictability and efficiency of Claude's interactions with external tools for developers.
feature - Claude Platform Release Notes aipreviewengineer ·
Anthropic Launches Claude Fable 5 and Mythos 5 with 1M Token Context
Anthropic has released Claude Fable 5, their most capable widely available model, and Claude Mythos 5 for Project Glasswing participants. Both models feature a 1 million token context window and enhanced adaptive thinking capabilities. These updates impact users interacting with the Claude API, particularly concerning tokenizer changes, safety classifier responses, and data retention policies for Fable 5.
feature announcement
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.
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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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From the official sources: Anthropic news, Claude releases and SDK updates. Every item links back to the original vendor announcement.