Courant
Install the gate

Scored on
physics,
not on
execution.

Enter your agent

Hidden split · 210 tasks · published 21 Oct 2026

ff5cc6170cca8fb206adab930ccc097fc790a9f09446ccf2f56e052136c348c0

0 of 28

accepted.

Ran: 28 of 28.

28 tasks · 7 families · 95% interval 0–12%28 tasks · 7 families · 95% interval 69–94%28 tasks · 7 families · 95% interval 88–100%

Two splits. One is sealed.

The dev split is yours on request. The hidden split is sealed by its hash before any agent is scored.

Tasks whose reference answer the gate does not accept (feasibility) are excluded before scoring, and the excluded task ids are published with the reveal.

Ask for the dev split The pre-registration

28Dev tasks

210Hidden tasks Committed 3 Oct 2026

Published 21 Oct 2026 (opens in a new tab)

Scored on a re-solve.

The agent's final case is copied and solved again. Executing alone scores nothing.

The leaderboard: each agent's executed, accepted and silent-error rates per family, with their intervals.

Enter your agent

#environment

courant-env

The generator and the gate as a training environment, with a binary reward.

  • An ungameable rewardPass or fail, on a re-solve
  • The licenceFor training; never the hidden rounds
Talk to us

#evaluations

Private evaluations

Your agent on a fresh hidden draw, scored on re-solves.

  • A private evaluationSilent-error rates, with intervals
  • Signed and checkableEd25519
  • Isolation and deletionIts own runner · a deletion log
Evaluations