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 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 - 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 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.
patch - Claude Code Releases sdkaiengineer ·
Claude-Code v2.1.167: Bug Fixes and Reliability Improvements
Claude-Code version 2.1.167 addresses underlying bugs and enhances overall reliability. This patch is relevant for users of the Claude-Code model, particularly those integrating it into their development workflows. The specific improvements focus on fixing defects rather than introducing new features.
patch - Claude Code Releases sdkaiengineermedia ·
Claude Code v2.1.166: Improved fallbacks, session hardening, and bug fixes
This patch for Claude Code introduces a `fallbackModel` setting to automatically retry with alternative models on overload or unavailability, enhancing resilience. It also hardens cross-session messaging by stripping user authority from relayed messages and adds improved error handling for API rejections. These changes benefit users relying on Claude Code for coding assistance, particularly in complex or unstable environments, by ensuring more consistent operation and fixing several bugs affecting IDE integration and terminal handling.
patch - Anthropic Python SDK Releases sdkaideprecation ·
Anthropic SDK Python v0.106.0: Claude Opus 4.1 deprecated, client fixes
Anthropic has released version 0.106.0 of its Python SDK, marking Claude Opus 4.1 as deprecated. This release also includes bug fixes for the Foundry client's copy and with_options methods, and improves schema transformation to preserve $defs. Users of the Python SDK are advised to note the deprecation and benefit from the client enhancements.
feature patch - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.165 Patch Addresses Bugs
Anthropic has released version 2.1.165 of Claude Code, focusing on bug fixes and reliability improvements. This patch aims to enhance the stability and performance of the coding assistant for users. It is available now for all users leveraging Claude Code.
patch - Claude Platform Release Notes aideprecation ·
Claude Platform Updates: New Models, Deprecations, and Tool Enhancements
Anthropic has released new flagship models, Claude Fable 5 and Claude Opus 4.8, featuring larger context windows and enhanced adaptive thinking. The company is also retiring older models like Claude Sonnet 4 and Opus 4.1, recommending upgrades. Several tools and platform features, including code execution, web search, and managed agents, have received updates and expanded availability on AWS, impacting developers and researchers using the Claude API.
feature deprecation patch - Claude Code Releases sdkaiengineer ·
Claude Code v2.1.162: Enhanced Agent Features and Bug Fixes
This update for Claude Code introduces several enhancements, including new details in `claude agents --json` to clarify session blocking, improved handling of search tools, and persistent default settings for effort levels. It also addresses numerous bugs, such as silent startup hangs, incorrect permission rule application, and display issues within the agents view, improving overall stability and user feedback for developers using the integrated coding environment.
patch feature - Claude Code Releases sdkai ·
Claude Code v2.1.161: Enhanced Usage Metrics, Tool Call Fixes, and UI Improvements
Claude Code version 2.1.161 incorporates `OTEL_RESOURCE_ATTRIBUTES` into metric datapoints for granular usage analysis, and enhances parallel tool call reliability by preventing failed Bash commands from canceling other operations. This patch also introduces UI refinements, improves handling of unused connectors, and addresses several regressions and bugs affecting sessions, policies, and terminal rendering for a smoother developer experience. The update is available now for all users.
patch feature - Claude Code Releases sdkai ·
Claude Code v2.1.160: Security, Stability, and UX Improvements
This patch enhances Claude Code's security and stability by adding prompts for writing to sensitive shell startup and build-tool config files, preventing unintended command execution. It also improves user experience with fixes for session restoration, clipboard functionality on WSL, and responsiveness issues on Windows. These updates benefit all users, particularly those on Windows or relying on background sessions, with improved stability and a more robust security posture.
patch security - Claude Platform Release Notes aimedia ·
Claude Platform Enhancements: Output Capping and Refusal Billing
Claude Platform now supports a `max_tokens` parameter for the advisor tool to reduce latency and costs by capping output. Additionally, users are no longer billed for requests that result in a refusal without any output. These changes are available on the Claude API and aim to improve efficiency and cost management for developers utilizing the advisor tool and handling refusals.
feature patch - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK Python v0.105.2 Release
Anthropic has released version 0.105.2 of its Python SDK. This patch update contains minor adjustments and improvements to the SDK. Users are encouraged to update to the latest version for the most stable experience.
patch - Anthropic Python SDK Releases sdkaiengineer ·
Anthropic SDK Python v0.105.1: Trusted Publishing for PyPI
The Anthropic SDK for Python has released version 0.105.1. This update primarily focuses on internal improvements by adopting Trusted Publishing for PyPI releases. This change aims to streamline and secure the deployment process for library maintainers. The update is available now and applies to all users of the Python SDK.
patch - Claude Platform Release Notes ai ·
Claude Platform Updates: New Models, Tools, and AWS Integration
Anthropic has released new models like Claude Fable 5 and Claude Opus 4.8, featuring expanded context windows and improved adaptive thinking. Updates to tools like the code execution and web search tools enhance agentic workflows. Key features include mid-conversation system messages and expanded Claude Managed Agents capabilities on AWS. These updates are relevant to developers and architects integrating Claude into applications.
feature deprecation patch - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.105.0 adds Claude 4 Opus support and file size caps
Anthropic's Python SDK has been updated to version 0.105.0, introducing support for the Claude 4 Opus model and allowing for custom file size caps. This release also includes enhancements to mid-conversation system blocks and detailed token usage. These updates are available now for developers integrating Anthropic's models into their Python applications.
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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.
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.