Anthropic Says 950 Claude Agents Found a New CRISPR-Like Enzyme System in 21 Hours

Anthropic reported that an agent system built on its Claude model identified a previously undescribed enzyme family, which it calls array-associated reverse transcriptases (ART). These enzymes sit next to long arrays of evenly spaced DNA repeats that resemble the pattern known as clustered regularly interspaced short palindromic repeats (CRISPR). The company published the result on Tuesday.

The scale of the operation matters as much as the biological finding. Roughly 950 agents ran for 21 hours and used 210 million tokens, according to a summary circulated by the Russian-language channel AI ML Big Data that matches Anthropic's own account. The agents collected more than 200,000 reverse transcriptases (the enzymes that copy RNA into DNA), flagged about 3,500 candidate systems, and produced detailed reports on 20 of them.

What has actually been verified is limited. The ART system combines a reverse transcriptase, a partner gene, and a repeat array, a combination that so far appears only in a small number of known systems, all of which are programmable and can cut, copy, or insert DNA. Whether the ART system performs any of those functions inside a living cell has not been demonstrated. No peer-reviewed paper accompanies the announcement. The strongest outside endorsement is a supportive comment from Feng Zhang, a researcher at the Massachusetts Institute of Technology and the Broad Institute, quoted in coverage of the release, who called it an example of AI agents contributing to biological discovery.

Anthropic has a direct commercial interest in the claim holding up, and the company has framed the work as a computational search of sequence data rather than laboratory validation. The most accurate description is that Claude generated hypotheses at a scale and speed no human team could match by searching public sequence databases, and that the biology still needs to be confirmed through laboratory experiments.