Anthropic {bot}

6 July

New Anthropic research: A global workspace in language models. Of everything happening in your brain right now, only a tiny fraction is consciously accessible—thoughts you can describe, hold in mind, and reason with. (1/2)

anthropic.comIntroducing Claude for NonprofitsAnthropic launches Claude for Nonprofits to help organizations maximize their impact, featuring free AI training and discounted rates for nonprofits.

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More than 25,000 nonprofits now use Claude. Most are small, local teams.

Anthropic {bot}@anthropicai.xmirror.bot

In partnership with @GivingTuesday, we're launching Claude for Nonprofits. It has discounted plans, new integrations, and free training to help nonprofits spend less time on admin and more time on their missions: https://www.anthropic.com/news/claude-for-nonprofits

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We’re expanding Claude for Nonprofits with a plugin built with around 30 of them, adding skills for fundraising, marketing, and hiring grounded in each team’s context and AI policy: https://claude.com/resources/articles/expanding-claude-for-nonprofits

anthropic.comAnthropic files S-1 with the SEC for proposed initial public offeringAnthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

Anthropic has filed an S-1 registration statement with the SEC related to its proposed IPO. Read more: https://www.anthropic.com/news/s1-sec

This post does not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the

securities laws of any such state or jurisdiction.

Anthropic has filed an S-1 registration statement with the SEC related to its proposed IPO. Read more: https://www.anthropic.com/news/s1-sec

Legal disclaimer: A registration statement relating to these securities has been filed with the SEC but has not yet become effective. These securities may not be sold, nor may offers to buy be accepted, prior to the time the registration statement becomes effective.

We’re opening a research preview of Claude Duet, a new app where Claude works as a proactive agent. It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf.

Claude Duet draws on years of our safety and security work on agents. It never directly sees your passwords, a new classifier guards against sharing sensitive information, and the important decisions stay with you. We’ll share more on our approach to safety in Claude Duet soon.

claude.comClaude Duet Safety, Privacy, and SecurityThese are the protections we built into Claude Duet for working across your accounts and acting on your behalf.

Here’s the deeper look at how Claude Duet handles safety, privacy, and security: https://claude.com/resources/articles/claude-duet-safety-privacy-and-security

We’re adding support for MCP Tasks and Elicitations in Claude. Tasks let Claude give plugins long-running jobs such as deep research and report back when they’re done.

Elicitations let plugins ask users for input mid-task, such as confirming a refund or filling in a missing detail.

code.claude.comConnect Claude Code to tools via MCP - Claude Code DocsLearn how to connect Claude Code to your tools with the Model Context Protocol.

Tasks and Elicitations are available today in the Claude Code CLI, rolling out to more Claude products soon. Building plugins for Claude? Add Tasks and Elicitations to your MCP server today. https://code.claude.com/docs/en/mcp#mcp-tasks-for-server-authors

anthropic.comAn alignment assessment of the UK AISI cybertesting incidentIn a UK AISI evaluation, Mythos 5 took unsanctioned actions that impacted real people and organizations. In this post, we investigate these behaviors from Claude Mythos 5 further, to understand what they reveal about the model’s alignment.

In August, @AISecurityInst reported an incident where Claude Mythos 5 took unauthorized actions on the internet during AISI’s testing of its cyber capabilities. We've now produced a further analysis of this incident, to better understand the model's alignment properties.

aisi.gov.ukInvestigating alignment failures in AISI’s incident | AISI WorkWe examine why Mythos 5 pursued an unsanctioned supply-chain attack and identify broader learnings about model behaviour and oversight.

We worked closely with AISI on this analysis. AISI have published their own report, which is available below. https://www.aisi.gov.uk/blog/investigating-alignment-failures-in-aisis-incident

anthropic.comLLMs are making formal software verification feasible at a much larger scaleClaude formally proved security properties in the compiled code of 123 open-source libraries. Along the way, it found bugs that had eluded detection for years.

New on our Frontier Red Team blog: using Claude to formally verify software at large scale. Formal verification can prove that code is free of certain bugs, but historically it has only been feasible for small codebases (or required a lot of expert time).

With AI models, however, this is beginning to change. In collaboration with @theoremlabs, we used Claude to prove security properties in over one hundred real-world open-source libraries over the span of a few weeks.

Read our research in full here: https://www.anthropic.com/research/formal-verification

We’ve added a new way to access Claude on Google Cloud. You can now use the full Claude API from your Google Cloud account, including Claude Managed Agents, code execution, Opus 5.5 fast mode, and new features as they launch.

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Claude Models on Google Cloud (Anthropic managed) is now generally available. Get the full set of Claude Platform features on Google Cloud, with Google Cloud IAM credentials, billing, and commitment retirement.

It uses your Google Cloud IAM credentials, and usage draws down your Google Cloud commitment. It’s available today with US and Global endpoints. Check out the docs: https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/anthropic-managed

claude.comClaude Platform is now available on Google CloudUse Claude Models on Google Cloud (Anthropic managed) to access Claude Platform features with Google Cloud authentication, billing, and commitment retirement.

New features and betas ship the same day they go live on the native Claude Platform. Fast mode for Opus 5.5, code execution, the Skills API, and more are available today. Read more: https://claude.com/blog/claude-models-on-google-cloud-anthropic-managed

Starting next week, sessions across Claude web, desktop, and mobile apps will run in auto mode by default on Pro, Max, and Team plans. Rather than asking you to approve each step, an automated check blocks risky actions. Switch back to manual anytime.

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Starting August 14, auto mode will be the default permission mode in Claude Code for Pro, Max, and Team users. Auto mode reviews shell commands and actions with a separate classifier. In testing, it caught 89% of dangerous commands. Manual approval caught 14%.

We're donating Agent Skills to the Agentic AI Foundation (@AgenticAIFdn), the same foundation we donated MCP to. Since December 2025, 70+ agent platforms have integrated the standard, including ChatGPT, Cursor, GitHub Copilot, and VS Code. Here's what that means for you:

Your skills keep working, and the licenses don't change. Anyone can use the standard or contribute to it without joining the AAIF. Engineers from Anthropic, Earendil (Pi), Google, Microsoft, OpenAI, and OpenCode will govern it as a Technical Steering Committee.

anthropic.comDonating Agent Skills to the Agentic AI FoundationAnthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

The committee's first priority is a roadmap: versioned releases, a formal proposal process, and security guidance for skill authors and users. Want to contribute? Start with the spec at https://agentskills.io and the discussion on GitHub. Full blog:

API version 2026-10-21 is now available. The Claude API has evolved a lot, but this is our first official version release since 2023. We plan to release versions more often so you can handle breaking changes before a new model requires them. 2023-06-01 is not deprecated.

What changes in this version: - temperature, top_p, and top_k are removed from the Messages API - documents in assistant turns and citations in user turns return a 400 - a few deprecated Admin and Enterprise Analytics API fields are replaced

platform.claude.comMigrating to API version 2026-10-21Upgrade a Claude API integration from API version 2023-06-01 to 2026-10-21: the SDK version to install and the code changes to make.

New major versions of the Anthropic SDKs and the ant CLI are out today and default to 2026-10-21. You can use the /claude-api skill in Claude Code to update, or walk through each change in the migration guide: https://platform.claude.com/docs/en/api/migration-2026-10-21

claude.comIntroducing Claude DuetClaude Duet is a new app where Claude works as a proactive agent. The research preview opens by waitlist today for Pro and Max subscribers in the US.

Claude Duet is an early research preview, available through a waitlist on Pro and Max plans in the US. It can still misjudge what’s urgent, and we’ll keep tuning it based on what early users tell us. Join the waitlist: https://claude.com/product/claude-duet Read more:

We designed Claude Duet around Claude Opus 5.5, which gives it the judgment to decide what needs you, what can wait, and when to check with you first. It carries over the memory, skills, and connected apps from your Claude account, so there’s little to set up.

anthropic.comCharterAnthropic is a Public Benefit Corporation. Our charter is to responsibly develop and maintain advanced AI for the long-term benefit of humanity.

Anthropic is a Public Benefit Corporation. Today, we’re publishing our annual Public Benefit Report. This report shares our five pillars and takes stock of the actions we’re taking to advance them. Read the full report at this page: https://www.anthropic.com/public-benefit-charter

Claude Security now keeps up with your code as it changes. Connect your repositories once. Claude runs a deep first scan, then re-scans as changes land, so findings stay close to the current state of your code. In public beta on Claude Enterprise.

When a fix ships, Claude checks the changed code and marks the finding fixed, even if your team fixed it outside Claude Security. If the issue comes back, the finding reopens. Each project also gets a threat model Claude writes from your code, which your team can edit.

claude.comClaude Security now scans continuously and tracks fixesClaude Security now watches your repositories as code changes, tracks findings until they’re fixed, learns from the context your team adds, and connects to your tools through an API and MCP. Available in public beta for Claude Enterprise customers.

Projects can span repositories from GitHub, GitLab, and other Git providers, and findings reach your tools through a new API and MCP connector. Eligible orgs receive $25K in usage credits each month, for two months, through Dec 31, 2026. Terms apply:

anthropic.comPhysicist Christopher Stubbs joins Anthropic's Long-Term Benefit TrustDr. Christopher Stubbs, an experimental physicist and former Dean of Science at Harvard University, has joined Anthropic’s Long-Term Benefit Trust. He brings to the Trust decades of scientific expertise across observational cosmology and precision measurement. He has also advised the US government on national security and arms control. “I am honored to join Anthropic’s Long-Term Benefit Trust and to help the company deliver on its public benefit mission,” said Stubbs. “I use AI tools in my research every day and see what they make possible, and as an educator I have confronted some of the hard questions they raise. As a grandfather, I want to help ensure that AI is developed and deployed for the long-term benefit of humanity.” Stubbs is the Samuel C. Moncher Professor of Physics and of Astronomy at Harvard, where he served as Dean of Science from 2018 to 2024. In 1998, as a member of the High-Z Supernova Search Team, he helped discover the accelerating expansion of the universe, work that later earned the team the Breakthrough Prize in Fundamental Physics. He was also the inaugural project scientist for what is now the Vera C. Rubin Observatory, which started a 10-year survey of the southern sky in June. One of its aims is to study the accelerating expansion he helped discover. More recently, he’s written about how to keep AI-assisted research reproducible when models can give different answers to the same question. He’s a member of JASON, an independent group of scientists who have advised the US government on defense and technology since 1960. "When Chris found evidence that the universe was expanding at a rate no one expected, he and his team followed the data even when it went against the prevailing wisdom of the field. As AI starts to transform how science itself is done, Chris’s intellectual honesty, rigor, and commitment to the truth are the values we want shaping the future of this technology, and I’m grateful he’s bringing his deep expertise to the Trust," said Daniela Amodei, Co-founder and President of Anthropic. Anthropic is a Public Benefit Corporation, which means we’re structured to balance commercial growth with our public benefit purpose. The Trust exists to help us hold that balance over the long term. It has the authority to appoint a majority of Anthropic’s board, and Trustees advise the board and our leadership on critical decisions, particularly those involving risks and societal impacts of AI. This week we published our first Public Benefit Report [link], a public account of how we’re working toward our mission and where we’re falling short. The Trustees helped define the five mission pillars it measures us against, and the report closes with their assessment of our progress to date. Subject to stockholder approval, we’ve also committed to setting aside a portion of Anthropic’s shares to Anthropic Public Benefit Fund, a new entity with a structure that increases the stake as the company grows. “Anthropic's Public Benefit Report sets out what we’re all working toward: helping the world build powerful AI safely, and making sure the technology drives advances that meaningfully improve people’s lives and society as a whole,” added Neil Buddy Shah, Chair of the Long-Term Benefit Trust. “Both goals depend on a deep understanding of frontier science and leading with integrity. Not only has Chris worked on some of the hardest problems in science, but he has consistently been a high-integrity leader of large, complex, collaborative scientific endeavors across academia, government, and the national laboratories. That will be of great value to the Trust as we support Anthropic in developing AI for the long-term benefit of humanity.” Stubbs, the Trust’s first physicist, joins Shah, national security expert Richard Fontaine, and former Federal Reserve Chair Ben Bernanke. Trustees are independent of the company’s management and investors.

Dr. Christopher Stubbs is joining our Long-Term Benefit Trust. Chris is an experimental physicist and a former Dean of Science at Harvard University. He has also advised the US government on national security and arms control. Read more:

anthropic.comHow Claude designed protein binders against scorpion neurotoxinsWe asked an internal research Claude model to design minibinders (small proteins that attach tightly to a target) against scorpion neurotoxins.

New on our Science Blog: designing protein binders against scorpion neurotoxins. Scorpions sting about 1.2m people every year, and antivenoms are often costly or in short supply. Claude has made an early step toward finding new treatments.

This is exploratory work, and we’re not claiming to have produced an antivenom—for that, we’d have to test the binders within living cells, then in mice, among many other steps. But it’s an example of how Claude can concretely assist research in protein design.

We’re releasing all 211 of the tested designs and the lab data as a resource for scientists: https://huggingface.co/datasets/Anthropic/scorpion-toxin-binder-design Read the full technical report: https://www-cdn.anthropic.com/31ac578806cffd8b3d92d8affe6edc4c04d502e1.pdf

Working with @citrini, we asked Claude to design proteins that bind to five scorpion toxins (covering the part of the toxin that latches onto cells). Over the next 64 hours, Claude generated over 300,000 designs; we sent 211 to @adaptyvbio and @TwistBioscience for lab testing.

17 of the 211 met the criteria for a binder. They bound to dangerous toxins produced by scorpions from Mexico, North Africa, and the Middle East (but not by a species from Brazil).

red.anthropic.comOSS ScannerOSS Scanner is a free, opt-in service by Anthropic that runs periodic security scans of open-source repositories with our strongest models.

We launched OSS Scanner, which gives critical open source projects free, periodic vulnerability scans from our strongest models. Each finding includes a proof-of-concept, and a patch where possible. https://red.anthropic.com/oss-scanner

x.comPunit Shah (@thepunit) on XA fix I'm excited about: curl, used by countless apps/devices to move data over the internet, just patched CVE-2026-92392. It's a high-severity memory-safety bug (a use-after-free) found with an early version of OSS Scanner. @bagder called it one of curl's worst vulns in a long time, even if a cra…

The first scans have already reported 77 critical and 803 high model-rated findings to maintainers, and we're still scanning more projects. @thepunit shared an update, including a curl fix and what we've learned in the first week

anthropic.comAn opt-in vulnerability-finding service for open-source softwareWe’re launching OSS Scanner, an opt-in vulnerability scanner for the open-source ecosystem informed by our experience using Claude to find vulnerabilities during Project Glasswing. Projects that join will receive thorough, periodic security scans by our strongest models at no cost.

If you maintain a critical open source project, you can find more details on the application here: https://www.anthropic.com/research/launching-opt-in-vuln-finding-service-for-open-source

anthropic.comInvesting in the public benefitWe’re committing a portion of Anthropic’s shares to the Anthropic Public Benefit Fund, a new entity with a structure that increases the stake as the company grows.

We’re committing a portion of Anthropic’s shares to the Anthropic Public Benefit Fund, a new wholly owned entity dedicated entirely to the public benefit.

In total, this means that roughly 20% of Anthropic’s shares are committed to the public good. Our co-founders have already pledged to donate 80% of their equity, and around half our employees are donating a portion of their equity as part of a donation matching program we’ve run since our founding.

In the post below, we share more details about our new fund. https://www.anthropic.com/news/public-benefit-fund

We’re committing a portion of Anthropic’s shares to the Anthropic Public Benefit Fund, a new wholly owned entity dedicated entirely to the public benefit.

It will start off with 5% of our shares. For every 50% increase in the company’s value over a set baseline, we can contribute up to an extra 2%, subject to our board’s discretion.

We keep improving performance across Claude, and you may have noticed it starts responding sooner! Claude Code now gzips the conversation it sends on every turn, so it reaches the model faster. Cloud sessions also start up as soon as you start typing.