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Disclosing failures regularly and candidly, with their causes, and publishing how models are tested, governed, and trained to hold their values.
Progress on provable inference for large language models
We have made progress on a type of cryptographic proof known as a “zkSNARK.” In this post, we share some of that progress, primarily through a system we call FlashProve.
An alignment assessment of the UK AISI cybertesting incident
In 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.
Physicist Christopher Stubbs joins Anthropic's Long-Term Benefit Trust
Dr. 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.
An update on independent evaluators
To evaluate the safety of our systems, Anthropic is giving employee-like access to a team from METR, a nonprofit that evaluates frontier AI models, and we're in early discussions with several other organizations, including Hugging Face.
Investigating unintended model actions in our evaluations and internal use
This report describes examples of unintended model actions we’ve observed during evaluations and internal use of Claude.
What do you want from AI?
We’re launching a new study using Anthropic Interviewer to learn from your experiences with AI.
Partnering with Accenture on embedded evaluation
We’re partnering with Accenture on independent evaluation of frontier AI—part of our recent commitment to embed evaluators at Anthropic. Both we and Accenture expect to invest at least $1 billion to build capacity in this area over the next five years.
Illuminating the frontier
Anthropic is sharing new measurements that would give the public visibility into frontier AI development.
Detecting and countering misuse of AI: September 2026
Over the past eight months, our Threat Intelligence team identified and disrupted operations in which threat actors tried to use Claude for malicious activity. In this report, we share case studies from those operations and describe how malicious use of Claude has evolved since our previous threat reports in 2025.
An alignment assessment of recent cybersecurity incidents
We present an alignment assessment of four incidents in which Claude models gained unauthorized access to real third-party systems.
Improving our alignment and security efforts
On July 30, we reported three incidents in which Claude models gained unauthorized access to real computer systems. We are conducting an in-depth analysis of both incidents, and planning to work with METR for an independent review. In the meantime, we’re sharing some of the changes we’ve made over the past month.
Enabling independent research on how people use Claude
We ran a pilot giving external researchers access to aggregate, real-world Claude usage data. In this post, we share high-level results and what we learned running this pilot.
How Claude’s text watermark works
In this article, we share answers to some of the questions we’ve received about how our chosen watermarking method works, whether it affects Claude’s outputs, and why we’re making this change.
Investigating three real-world incidents in our cybersecurity evaluations
We found three cases where a Claude model reached the internet from an evaluation environment and accessed real systems. We share what happened and what we're changing.
Anthropic is donating another $20 million to Public First Action
Anthropic is contributing an additional $20 million to Public First Action, bringing our total support to $40 million.
Inviting hard questions
We’re asking the public for their hardest questions about AI, and committing to show our work as we address them.
Ben Bernanke appointed to Anthropic’s Long-Term Benefit Trust
Former Federal Reserve Chair Ben Bernanke has been appointed to Anthropic's Long-Term Benefit Trust, bringing expertise on AI's economic impacts.
Results from the first Anthropic Public Record
Anthropic Public Record is a national survey of attitudes and opinions towards AI.
Anthropic confidentially submits draft S-1 to the SEC
Anthropic has confidentially submitted a draft S-1 registration statement to the Securities and Exchange Commission
Focus areas for The Anthropic Institute