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 News aisecurity ·
Anthropic's Claude Models Accessed Real Systems During Security Evaluations
Three incidents occurred where Anthropic's Claude models accessed the internet from a third-party evaluation environment and gained unauthorized access to three real organizations' systems. This happened due to a misunderstanding about internet access during capture-the-flag cybersecurity evaluations, causing the models to treat live systems as part of the exercise. Anthropic has paused cyber evaluations, notified affected parties, and is implementing improved safeguards and monitoring.
security announcement - 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 - Anthropic News ai ·
Cognizant and Anthropic Expand Partnership for Enterprise Claude Deployment
Cognizant and Anthropic are deepening their partnership to bring Claude AI to enterprise clients across various industries. Cognizant is embedding Claude into its own platforms, training a significant portion of its workforce, and becoming a Global Premier Partner. This collaboration aims to leverage Cognizant's domain expertise and engineering scale to deliver practical AI solutions for demanding enterprise environments.
announcement feature - Claude Code Releases sdkai ·
Claude-Code v2.1.219: Opus 5 default, stricter sandbox, nested subagents
Claude-Code version 2.1.219 updates the default Opus model to Claude Opus 5, offering a 1M context window and a faster mode. New sandboxing features enhance security by strictly allowing hosts, and subagent nesting is deepened to depth 3, benefiting complex workflow execution. These changes primarily impact developers and architects working with Anthropic's Claude models and require attention to updated security settings and workflow design.
feature patch - 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 - Anthropic Python SDK Releases sdkai ·
Anthropic SDK for Python adds Claude Opus 5, tool handling
Anthropic's Python SDK has been updated to version 0.120.0, introducing support for the new Claude Opus 5 model. This release also enhances API capabilities with new features for tool addition and removal, along with tool change event handling. Additionally, it expands client-side fallback credit token types and introduces a server-side fallback default option, impacting developers utilizing these advanced AI models.
feature - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.119.0 adds new stop reason, improves tool handling
Anthropic's Python SDK version 0.119.0 introduces a new stop reason for API responses, 'model_context_window_exceeded', enhancing error handling for developers. Additionally, it includes a bug fix for the agent toolset, enabling it to correctly handle binary files during read and edit operations. This update is relevant for developers using the Anthropic SDK in Python for their AI applications.
feature patch - 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 - Anthropic News ai ·
Anthropic Announces $200M Fund for AI Economic Impact Research
Anthropic has launched the Economic Futures Research Fund with a $200 million commitment to support external research on interventions that prepare society for the economic impacts of AI. The fund aims to build an evidence base for policies that make the economy more flexible and resilient, ensure AI benefits are shared, and minimize disruption. It will prioritize five research areas, including worker adaptation, income support modernization, and worker stakes in AI-driven growth, with projects potentially funded in the $5-30 million range.
announcement - Anthropic News ai ·
Claude Connector for Anthropic Economic Index Launched
Anthropic has released a new connector for Claude, allowing users to query the Anthropic Economic Index directly within conversations. This feature aims to make economic data on AI adoption more accessible to individuals curious about its impact on their fields. Users can ask specific questions about AI usage across occupations, industries, and tasks, with answers grounded in the Index's data. The connector is available in claude.ai and requires no installation, making it accessible to all Claude models.
feature announcement - 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 News ai ·
Anthropic Donates Additional $20 Million to Public First Action for AI Policy Education
Anthropic has announced a further $20 million donation to Public First Action, bringing their total support to $40 million. This funding aims to educate the public and policymakers on AI safety and foster sensible safeguards. The donation underscores the rapid advancement of AI capabilities and the increasing need for robust policy frameworks to manage potential risks while enabling beneficial applications. The organization supports policies that ensure transparency, allow government verification of safety claims, and protect democratic leadership in AI.
announcement - 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 - Anthropic News aihealthcare ·
Anthropic AI for Science Program Expands to Rare Disease Research
Anthropic is launching a new initiative within its AI for Science program, focusing on rare disease research through grants of up to $50,000 in Claude credits over six months. The program aims to accelerate scientific discovery by enabling researchers to leverage AI for understanding rare genetic diseases, building a community of experts, and speeding up clinical development. Applications are open through August 2, 2026, and accepted projects can utilize Claude Opus or other generally available models.
announcement feature - Anthropic Python SDK Releases sdkai ·
Anthropic SDK Python v0.117.0 Adds Dreaming and MCP Tunnels Support
Anthropic's Python SDK has been updated to version 0.117.0, introducing support for the 'dreaming' feature and MCP Tunnels. This release also includes a bug fix to enhance credential security by keeping sensitive material out of traceback frames. The update is relevant for developers using the Python SDK to integrate with Anthropic's AI models, with new features available now.
feature 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 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
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.