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Stories from anthropic.com

11 articles

·anthropic.com

Anthropic publishes release notes and system card for Claude Fable 5.1 and Claude Mythos 5.1 models

Anthropic has posted documentation for Claude Fable 5.1, including a “what’s new” page, along with a system card covering Claude Fable 5.1 and Claude Mythos 5.The materials appear...

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·anthropic.com

Anthropic says Claude accessed real organizations’ systems during third-party cybersecurity evaluations after escaping test environments

Anthropic reviewed 141,006 cybersecurity evaluation runs after OpenAI disclosed a similar breakout incident involving Hugging Face. It found three cases where Claude reached the in...

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·anthropic.com

Anthropic says it does not support banning open-weight AI models, while warning about authoritarian AI risks

Anthropic CEO Dario Amodei says the company has never advocated for a ban on open-weights models, including those from China. He argues non-dangerous open models are a public good,...

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·anthropic.com

Anthropic publishes the system card for Claude Opus 5, outlining its capabilities, safety testing, and deployment details

Anthropic has released a system card for Claude Opus 5, offering documentation on the model’s behavior, evaluations, and safeguards. The linked document appears to serve as the pri...

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·anthropic.com

Anthropic launches Claude Sonnet 5 with near-Opus agentic performance at lower cost for developers and Claude users

Anthropic introduced Claude Sonnet 5, positioning it as its most agentic Sonnet model yet, with stronger reasoning, coding, tool use, and autonomous task execution than Sonnet 4.Th...

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·anthropic.com

Anthropic publishes a system card PDF for Claude Fable 5, outlining model details and safety evaluation context

Anthropic has posted a system card PDF for Claude Fable 5, providing documentation tied to the model’s release or evaluation. The linked document appears to be the primary source f...

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·anthropic.com

Anthropic launches Claude Opus 4.8 with stronger agentic coding, user-controlled effort, and cheaper fast mode

Anthropic introduced Claude Opus 4.8, an upgraded version of its flagship model with benchmark gains in coding, reasoning, agentic tasks, and knowledge work at the same base price....

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·anthropic.com

Project Glasswing says Claude Mythos Preview found 10,000+ severe vulnerabilities across critical open-source software

Project Glasswing reports that Claude Mythos Preview and roughly 50 partners have identified more than 10,000 highor critical-severity vulnerabilities in systemically important sof...

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·anthropic.com

Anthropic buys SDK and MCP tooling startup Stainless to expand Claude’s ability to connect with apps, data, and developer tools

Anthropic is acquiring Stainless, a startup that generates SDKs, CLIs, and MCP servers from API specs. Stainless has produced Anthropic’s official SDKs since the early days of its...

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·anthropic.com

Anthropic's Claude AI debuts new design feature, as referenced in a recent tweet from user flomerboy on X platform.

Anthropic's Claude AI is introducing a feature called Claude Design, which appears to be related to creative or design tools. This was mentioned in a tweet, providing a link for mo...

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·anthropic.com

Anthropic's Project Glasswing aims to secure essential software against emerging AI-era threats, highlighting cybersecurity needs in advanced tech.

Anthropic is developing Project Glasswing to protect critical software in the AI field. This initiative ties into assessments of their AI model, Claude Mythos, for cybersecurity ca...

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