# Anthropic Says Claude Designed 1,320 Protein Binders and 354 of Them Bound in the Lab

The agents hit 14 of 15 targets for a 26.8 percent overall hit rate, rising to 49 percent among designs the model itself ranked first.

- Published: 2026-08-20T06:25:18.874Z
- Canonical: https://polylog.news/ai/2026-08-20/anthropic-says-claude-designed-1-320-protein-binders-and-354
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Anthropic Research](https://www.anthropic.com/research/team/frontier-red-team)

Anthropic gave Claude Opus 4.8 and an unreleased model it calls Mythos Preview a set of biological targets and asked each for 30 candidate minibinders. Of 1,320 designs synthesized and tested, 354 bound to their target, a hit rate of 26.8 p…

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