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 - Anthropic News aisecurityengineer ·
Anthropic CEO on Open-Weights Models and National Security
Anthropic's CEO clarifies the company's stance, stating they do not advocate for a ban on open-weights AI models, deeming them a public good when lacking dangerous capabilities. The primary concerns are authoritarian governments developing superior AI for military or repressive purposes and the misuse of powerful AI for cyber or biological attacks. Anthropic supports measures like restricting powerful chip sales to China, deterring industrial-scale distillation, and mandating safety testing for all capable models, regardless of their openness.
announcement - 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 Release Notes aiengineer ·
Anthropic launches Claude Opus 5
Anthropic has launched Claude Opus 5, a new model designed to be thoughtful and proactive. This model offers performance approaching that of Claude Fable 5 but at half the cost. Further details are available in their official blog post.
feature announcement - Anthropic News aigaengineer ·
Anthropic Releases Claude Opus 5 with Enhanced Performance and Efficiency
Anthropic has launched Claude Opus 5, a significant upgrade to its Opus tier model, offering improved performance in coding and professional tasks at a reduced cost compared to its predecessor. It sets new benchmarks on evaluations like Frontier-Bench and GDPval-AA, demonstrating enhanced efficiency for everyday use, particularly in software engineering and scientific research. Opus 5 is now the default model on Claude Max and the strongest on Claude Pro, benefiting users who require advanced capabilities for complex workloads.
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 Platform Release Notes aideprecationengineer ·
Claude Workbench and Prompt Tools APIs to be Retired
Anthropic is retiring the legacy Claude Console Workbench on August 17, 2026, and will no longer support saved prompts, variables, or evals. The experimental prompt tools APIs will also be retired on the same date. Users should export any necessary data from the legacy Workbench and be aware that API requests to the retired endpoints will fail after the sunset date.
deprecation - 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 - Claude Release Notes aiengineer ·
Claude's memory updated to categorized entries
Claude's memory has been replaced with individual, categorized entries that are read and updated during conversations, replacing the previous daily summary. This change allows for more granular context management and builds on previous interactions. Users can learn more about leveraging Claude's new memory features in its documentation.
feature - 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 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 - Anthropic News aiengineereducation ·
Anthropic Launches Claude for Teachers with Free Premium Access
Anthropic has launched Claude for Teachers, offering verified US K-12 educators free access to premium Claude capabilities, teaching skills, and curriculum connections. This initiative aims to help teachers implement best practices, address time constraints, and improve student outcomes by integrating AI support into instructional planning and differentiation. The service includes integrations with various K-12 tools and is built with a focus on privacy and FERPA compliance. Educators can sign up for free access until June 30, 2027.
feature announcement - Anthropic News aigaengineer ·
Anthropic Invests $10M CAD in Canadian AI Research and Startups
Anthropic is committing $10 million CAD to fund AI research and development at leading Canadian institutions and support startups. This investment aims to advance beneficial and responsible AI applications, building on Canada's historical contributions to AI research. The initiative includes partnerships with major AI institutes and provides Claude API credits to researchers and startups, alongside a report on Claude usage in Canada.
announcement feature
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.