Claude Fable 5 and Claude Mythos 5
…s worth of AI-enabled cyber threats As AI transforms the nature of and methods behind cyberattacks, how well do the techniques and frameworks used by the security community hold up? In…
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Constitutional Classifiers: Defending against universal jailbreaks
…We extend our gratitude to all participants who contributed their time and expertise to this demonstration. Their efforts have provided invaluable data for improving AI safety. Change log *Update 5 February 2025…
Introducing Claude Sonnet 4.5
…AI Safety Level 3 (ASL-3) protections, as per our framework that matches model capabilities with appropriate safeguards. These safeguards include filters called classifiers that aim to detect potentially dangerous inputs and…
Agentic misalignment: How LLMs could be insider threats
…Therefore, labs need more extensive alignment and safety evaluations to identify known risks as well as research to uncover risks currently unknown to us. And frontier AI developers like Anthropic should publicly…
Partnering with Mozilla to improve Firefox’s security
…Their partnership , and the technical lessons we learned, provides a model for how AI-enabled security researchers and maintainers can work together to meet this moment. From model evaluations to a security…
Anthropic and Amazon expand collaboration for up to 5 gigawatts of new compute
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
Ben Bernanke appointed to Anthropic’s Long-Term Benefit Trust
…Their collective experience spans global health, national security, law, policy, and economics. Related content UST is bringing Claude to physical AI Inviting hard questions We’re asking the public for their hardest…
Focus areas for The Anthropic Institute
…Safety , we wrote that doing effective safety research required close contact with frontier AI systems. The same logic applies to doing effective research on AI’s impacts on security, the economy, and…
Investigating three real-world incidents in our cybersecurity evaluations
…Below we describe what happened, how it happened, and what we’re changing. We encourage other AI labs to perform similar reviews. This post reflects our current understanding; we'll update it…
Introducing Claude Opus 4.5
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.