Anthropic said on Wednesday, September 23, 2026, that its AI model Claude helped find a previously undescribed enzyme system in the DNA of bacteriophages — viruses that infect bacteria. The company compared parts of the find to patterns seen in CRISPR, the gene-editing tool.
It is the first public result from Anthropic’s new life-sciences group and wet lab in the San Francisco Bay Area.
What Claude found
Researchers asked Claude to search huge DNA databases for new examples of reverse transcriptases (RTs) — enzymes that copy RNA into DNA.
About 950 Claude agents ran for roughly 21 hours and used more than 210 million tokens. One agent flagged a repeating stretch of DNA next to an unusual RT gene. Humans then reviewed the lead and ran lab tests.
Anthropic named the system array-associated reverse transcriptases, or ART. It has three parts:
- the reverse transcriptase
- a nearby partner protein whose job is still unknown
- a long array of evenly spaced DNA repeats that look a bit like a CRISPR array
The underlying RT itself had already shown up in earlier studies. Anthropic says Claude was first to notice the wider system: the repeat array and the extra protein.
What it does not mean yet
Anthropic does not yet know what ART does. The company says only a few known systems share this kind of layout, and those systems can cut, copy, or paste DNA. That is a hint, not proof that ART is a new CRISPR.
The write-up is an early company report, not a finished, peer-reviewed paper. Outside scientists will need to check how new the system is and whether it can be used as a tool.
CEO Dario Amodei has called the result preliminary and said it might one day matter for gene therapy — if later work confirms a useful mechanism.
Why Anthropic is highlighting it
The company wants to show that AI agents can scan data at a scale that would take a human expert weeks or months, then hand the best leads to a lab. Scientists still wrote the first prompt and did the wet-lab work.
Source: Anthropic, Reuters, The Verge, TechCrunch