Anthropic Cuts Prices on Claude Sonnet 5 to Challenge Agent Market

Tarun Chhabra, Anthropic's head of national security policy and a former Biden administration official, is transitioning out of his current role. He will move into a new advisory position at the AI company focused on geopolitics and national security policy. The move reflects shifts in how Anthropic is structuring its policy and government relations work.

Anthropic's unreleased AI model has made measurable progress on the Riemann hypothesis, one of mathematics' most significant unsolved problems that has resisted solution for over 150 years. The company has not solved the problem, but the model's progress exceeds typical expectations for AI applied to such fundamental mathematical challenges. The development signals growing capability of large language models in tackling complex mathematical reasoning.

Anthropic has committed to embedding machine-readable watermarks in Claude-generated text and images to comply with European AI transparency regulations. The watermarks will be invisible to humans but detectable by people and platforms seeking to identify AI-generated content. The company says the changes are a future commitment rather than an immediate rollout, and will include digitally signed provenance metadata where supported.

Mark Zuckerberg republished a 6,500-word essay on Meta.com that largely duplicated a 1,000-word Wall Street Journal opinion piece published two weeks earlier, both arguing that AI's future should be accessible to everyone. The piece is part of a broader trend of lengthy essays from AI leaders including Dario Amodei at Anthropic, Sam Altman at OpenAI, and Satya Nadella at Microsoft, who use their platforms to discuss AI and society. The author notes these essays are often long and dry, raising questions about whether they are designed to demonstrate AI's summarization capabilities to consumers.