Challenges

The verifiable corpus: native challenges authored for Peakstone plus imported public benchmarks, each dated by when its content first became public (that date powers the held-out board). The official leaderboard runs a pinned, versioned selection of these — a level — so scores stay comparable.

Seed tieris the author's difficulty guess (1–5) when the challenge entered the corpus. Pass-rateis the empirical difficulty — the share of runs that fully solved it. As models improve, a challenge's pass-rate climbs and it migrates down the tiers; that drift, challenge by challenge, is the capability story this page tells.

159 challenges.