…Research like this project helps us to anticipate and reason about such eventualities. Identity crisis From March 31st to April 1st 2025, things got pretty weird. 4 On the afternoon of March…
Science Long-running Claude for scientific computing Mar 23, 2026 In this post, Siddharth Mishra-Sharma , a researcher on the Discovery team, explains how to apply multi-day agentic coding workflows—test…
…we can describe it, control it, and use it for deliberate reasoning, in contrast to all the automatic processing that goes on without our awareness. In a new paper, we present evidence…
…Sonnet 4.6’s 1M token context window is enough to hold entire codebases, lengthy contracts, or dozens of research papers in a single request. More importantly, Sonnet 4.6 reasons effectively…
…If we don’t apply some degree of anthropomorphic reasoning, we’re likely to miss, or fail to understand, important model behaviors. Anthropomorphic reasoning can also provide a useful baseline of comparison…
…It’s a substantial improvement over its predecessor, Sonnet 4.6, on important aspects of agentic performance like reasoning, tool use, coding, and knowledge work: Our safety assessments found that Sonnet 5…
…Typical contamination and eval awareness Out of the 11 total problems where the answer came from benchmark materials rather than original research, 9 were straightforward contamination, in which answers to benchmark questions…
…Those early exchanges have since grown into a broader research workstream on the moral formation of AI systems. Our first conversations have been with people from religious, philosophical, and cultural communities that…
…Further research into patching We are also conducting preliminary research into Claude's ability to generate and review patches that fix vulnerabilities. Patching vulnerabilities is a harder task than finding them because…
…Anthropic's models are unmatched in their reasoning capabilities and safety design. Claude has fundamentally changed what's possible in evidence generation. For the first time, our researchers can truly converse with…