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 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 - Anthropic News aiengineerfinance ·
Anthropic and TCS Partner to Bring Claude AI to Regulated Industries
Anthropic and Tata Consultancy Services (TCS) are partnering to bring Claude AI to regulated industries like finance and healthcare. TCS will deploy Claude internally to 50,000 employees and build Claude-powered products for clients, aiming to enhance accuracy and compliance. This collaboration will initially focus on industry-specific offerings such as claims processing and lending advisory, with work already underway in areas like customer experience improvement and software engineering productivity.
announcement feature - Anthropic News ai ·
Anthropic Public Record Survey Reveals Public Views on AI
Anthropic's first Public Record survey of nearly 52,000 Americans highlights significant public hopes for AI in areas like disease cure and support for people with disabilities, alongside widespread fears of job loss and cognitive dependency. The survey also indicates strong support for government regulation of AI, particularly concerning privacy, child safety, and liability. These findings are based on a November-December 2025 survey and aim to inform Anthropic's approach to AI development, building on previous user studies.
announcement - Anthropic News aigovernment ·
Anthropic suspends Fable 5 and Mythos 5 due to US government directive
Anthropic is suspending access to its Fable 5 and Mythos 5 models for all customers in response to a US government export control directive. The government cited national security concerns, believing a method to bypass the model's safeguards has been discovered. This action affects all users, including foreign national Anthropic employees, though other Anthropic models remain unaffected. Anthropic disagrees with the severity of the finding and is working to restore access.
announcement breaking - Claude Code Releases sdkaiengineer ·
Claude-Code v2.1.173: Fable 5 model names normalized, Windows startup warning fixed
Claude-Code v2.1.173 resolves an issue where Fable 5 model names were not normalized due to a `[1m]` suffix, which is now automatically stripped. Additionally, a spurious "sandbox dependencies missing" warning on Windows when the sandbox is enabled has been fixed. These changes primarily affect users of the Fable 5 model and Windows users with sandbox enabled.
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 - Anthropic News aiengineer ·
Anthropic and DXC Technology form global alliance to integrate Claude
Anthropic is partnering with DXC Technology to integrate its Claude AI model into systems used by major banks, airlines, and other regulated industries. DXC will train thousands of engineers to deploy Claude within customer environments, leveraging the AI for modernization, cybersecurity, and application services. This alliance aims to bring Claude's capabilities to mission-critical systems, with DXC having already integrated Claude into its own operations and AI-native orchestration platform, DXC OASIS.
announcement feature - Anthropic News aiengineer ·
Anthropic Launches Claude Corps AI Fellowship Program
Anthropic is launching Claude Corps, a national fellowship program that will train 1,000 early-career individuals in AI skills and place them at nonprofits for a year. This initiative aims to extend the benefits of AI to underserved communities and provide fellows with valuable career skills, backed by an initial $150 million investment. The program partners with CodePath for fellowship management and Social Finance for evaluation, and will support 400 nonprofits over the next year.
announcement feature - Claude Code Releases sdkaiengineermedia ·
Claude Code v2.1.172: Sub-agents, Bedrock region, and numerous fixes
This patch for Claude Code introduces a significant enhancement allowing sub-agents to spawn their own sub-agents up to five levels deep, expanding agent capabilities. It also improves Amazon Bedrock integration by respecting AWS region configuration and includes fixes for session management, tool usage, and UI rendering. These changes benefit developers and architects using Claude Code for complex agent-based workflows, particularly those integrating with AWS services or encountering specific tool/UI bugs.
patch feature - Claude Platform Release Notes ai ·
Claude Platform Updates: New Models, Tooling, and AWS Integration
Anthropic has released updates to its Claude Platform, including new models like Claude Fable 5 and Claude Opus 4.8, offering enhanced capabilities and larger context windows. The platform also introduces new tool functionalities, improved agent orchestration on AWS, and deprecates older models, requiring users to migrate to newer versions. These changes affect developers and organizations using the Claude API and its associated client SDKs and console.
feature deprecation patch - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK for Python v0.109.1 fixes API refusal category
Anthropic's Python SDK has been updated to version 0.109.1, introducing a bug fix for its API. This update adds the 'frontier_llm' refusal category, providing clearer information on specific API rejection reasons. This change is relevant for developers using the SDK to interact with Anthropic's language models.
patch - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic Python SDK v0.109.0 adds Managed Agents API support
Anthropic's Python SDK has been updated to version 0.109.0, introducing support for Managed Agents deployments. This feature allows developers to leverage advanced agent capabilities within their applications. The update also includes support for environment variable credentials, simplifying authentication for users. This release is now available for all users of the Python SDK.
feature - Claude Code Releases sdkaigaengineer ·
Anthropic Claude Code v2.1.170: Fable 5, Session Fixes
Anthropic has released Claude Code version 2.1.170, introducing the new Mythos-class model Claude Fable 5, now safe for general use and exceeding previous model capabilities. This update also resolves an issue where sessions and transcripts were not saved or retrievable via `--resume` when launched from specific terminal environments. This patch is available now for all users.
feature patch - Claude Release Notes ai ·
Anthropic Launches Claude Fable 5 Model
Anthropic has released Claude Fable 5, a Mythos-class model that is now safe for general use. This launch provides a new, more broadly applicable AI model for users. Further details are available in a related blog post.
feature announcement - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python Adds New Claude Models and Fallback Support
Anthropic SDK Python version 0.108.0 introduces support for the new claude-mythos-5 and claude-fable-5 models. This release also adds client-side fallback middleware for API providers that do not support server-side fallbacks, enhancing resilience for users. These features are available now for developers using the Python SDK.
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 - Anthropic News ai ·
Anthropic Launches Claude Fable 5 and Mythos 5 AI Models
Anthropic has released Claude Fable 5, a highly capable model for general use with safety safeguards, and Claude Mythos 5, a version with lifted safeguards for cybersecurity professionals. Fable 5 excels in software engineering, knowledge work, and vision tasks, while Mythos 5 demonstrates advanced capabilities in drug design and scientific hypothesis generation. Both models are priced significantly lower than their predecessors and are available with different access models.
feature announcement - Claude Code Releases sdkaiengineerfinance ·
Claude Code v2.1.169: Troubleshooting, Directory Navigation, and UI Fixes
This update to Claude Code introduces a `--safe-mode` flag for troubleshooting and a `/cd` command for changing directories mid-session without disrupting the prompt cache. It also includes numerous bug fixes addressing issues with UI responsiveness, enterprise policies, and agent management across platforms. These changes benefit developers and architects troubleshooting complex setups or working with large codebases, offering a more stable and efficient experience.
patch feature - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK Python v0.107.1 fixes API key header issue
This release of the Anthropic SDK for Python, version 0.107.1, addresses a bug related to API key authentication. Specifically, it ensures the 'x-api-key' header is correctly sent when using API key authentication with Foundry. This fix is important for users experiencing authentication failures due to the missing header.
patch - Claude Code Releases sdkaiengineer ·
Claude-Code v2.1.168: Bug fixes and reliability improvements
Claude-Code version 2.1.168 has been released, focusing on bug fixes and general reliability enhancements. This patch aims to improve the stability and performance of the Claude-Code model for its users. The update is available now for those who use Claude-Code in their development workflows.
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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.
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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.