In a report published on October 20, 2026, Anthropic states that an internal research Claude model designed protein binders against five scorpion neurotoxins largely autonomously, and that 17 of the 211 designs tested by Adaptyv Bio and Twist Bioscience met its binder criteria, with all 211 designs and their binding data released publicly.

● OPEN · settles 2026-10-24

Background

Scorpion stings hit at least 1.2 million people a year and kill more than 3,250, mostly children in places where antivenom is scarce or expensive. Anthropic pointed an internal research version of Claude at that problem and let it run a protein-design campaign largely on its own. Starting from one prompt, with four follow-ups from the team over 64 hours, the model picked target structures for five neurotoxins from four scorpion species, set its own quality thresholds, worked through 12 design tools and generated 318,484 candidate binders, then screened over half a million design-toxin pairs down to a shortlist of 180. Anthropic added 31 more, and two outside labs, Adaptyv Bio and Twist Bioscience, made and tested all 211. Seventeen designs passed a strict bar: binding evidence in every replicate at both labs, every measured affinity at 1 micromolar or tighter, and no stickiness against an unrelated human protein. The two strongest, aimed at the Mexican toxin Cn2, bound in the single-digit nanomolar range and appear to sit on the same spot as an antibody already shown to neutralise Cn2 in mice. Anthropic is careful about what this is not. Nothing was tested in cells or animals, none of the multi-toxin designs worked against more than one toxin, and a binder is only the first step toward an antivenom. What has been released is everything: all 211 designs and their binding data are public, so other groups can pick up where the campaign stopped.

This market exists because launch announcements are easy to make and hard to grade. Press releases describe what a company intends to ship; they rarely come back later to say whether it shipped. AI Rank Bank pulls one checkable sentence out of the coverage — the sentence above — gives it a date, and lets readers price it in public. The launch itself stays with its publisher; what lives here is the claim, the crowd's call, and eventually the receipt.

How this claim is judged

Judging criteria, fixed when the market opened: Delivered if, at the check time, Anthropic's report remains published with that result — 17 of 211 lab-tested designs meeting the binder criteria (a hit at both labs, every dissociation constant at 1 micromolar or tighter, no signal against the CLEC12A control protein) — and the public release of all 211 designs and their binding data remains available from the post. A retraction, or a correction changing the 17-of-211 figure, does not count.

The source of record is the publisher's own page linked above. A claim about a company's product is judged against that company's public output — its product pages, documentation, changelogs and official posts — not against rumors or third-party summaries. Only yes-or-no outcomes count: partial credit is not a verdict, and a claim that needs a paragraph of excuses has already answered itself.

How readers called it

2 readers called this claim. 100% said it would deliver.

2 Will deliver · 0 Won't ship

Points reward being right against the crowd. A correct call pays 100 × (1 − the share of readers who agreed with you when you placed it), with a floor of 10: side with a 90% consensus and a win pays 10, stand alone and a win pays up to 100. Wrong calls pay nothing. The price is locked in when the call is placed, so early readers are paid for judging before the crowd forms, not for copying it.

How readers split

Share of readers saying “will deliver”: opened at 100%, now at 100%. 3 snapshots on record since 2026-10-21 — a snapshot lands whenever a call is placed, and at least hourly while the market is open.

Verdict

No verdict yet. This claim is checked on 2026-10-24 08:00 Eastern Time (12:00 UTC) against the source of record below. When the check happens, one of three stamps lands on this page permanently: delivered if the claim came true as stated, busted if it did not, or unproven if the date passes without public evidence either way. Unproven claims pay no points and do not count against any reader's hit rate.

About this market

AI Rank Bank is an AI news front page with a memory. Every launch on the homepage carries one claim like this one, with a check date. Readers call claims with points, build a public record, and climb the leaderboard. Companies build a record too: every settled claim lands on the company's bank page, where its delivery rate is simple arithmetic that nobody gets to edit afterwards. There is no money in the market — points buy bragging rights only, which keeps the incentives pointed at being right.