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Dean W.

Brief

Dean W. Ball (@deanwball) warns that dismissing Mythos as "doomer hype" is effectively betting against future deep learning capability growth and can erode credibility. Supporting this concern, prinz reports that UK AISI's newer Mythos Preview checkpoint raises cybersecurity benchmark success to 6/10 on TLO (from 3/10) and achieves 3/10 on Cooling Tower, previously unsolved.

Why it matters

Dean W. Ball (@deanwball) asserts (2026-05-13) that calling Mythos "doomer hype" is an implicit bet against broad directional growth in deep learning; he says such bets have repeatedly been wrong and have damaged the credibility of some AI optimists.

Key details

  • prinz (@deredleritt3r) reports UK AISI's "newer Mythos Preview checkpoint" improves cybersecurity benchmark performance: TLO succeeds 6/10 attempts (up from 3/10) and Cooling Tower succeeds 3/10 attempts (previously unsolved).
Source evidence

In life, everything is a wager. Whether you realize it or not, you are constantly making implicit and explicit predictions about the future state of reality. To live is to predict.

So when you are faced with something like Mythos, and you say, “this is just ‘doomer hype’!,” what you are really doing is making a bet against model capabilities growth, and thus ultimately you are making a broad directional bet against deep learning, which has usually been a pretty bad bet to make.

I am surprised that so many people—people who are otherwise AI optimists!—continue to make these bets against deep learning. They keep being wrong, and the less humble among them have torched their credibility with anyone paying attention.

So ask yourself, when you make claims about AI and its future: “am I making an implicit bet against deep learning in a broad directional way?”

prinz (@deredleritt3r)

UK AISI has access to a "newer Mythos Preview checkpoint", which now performs significantly better on its cybersecurity benchmarks:

TLO: 6/10 attempts successful (up from 3/10 for the original Mythos)

Cooling Tower: 3/10 attempts successful (previously unsolved by AI)

— https://nitter.net/deredleritt3r/status/2054622719618977825#m