banteg · 2026-11-11 12:12 UTC

introducing sokobanteg frontier challenge every room opens with the shortest route any model found in the realtime eval runs: opus 5.5 starts with 28 rooms, fable 5.2 with 25, astra with 7, sol with 4, sonnet and carbon with one each. the best segment run of the whole trilogy is 3,819 inputs total. models already hit proven optimal in 44 of 66 rooms. in the remaining 22, my holdout routes tally to 3,064 keys, so 755 keys of slack, with only the target lengths shown so you can hunt them down yourself. 63/66 rooms are closed by lower-bound math proofs (part i = 748, part ii = 950, trilogy floor = 3,000). three rooms in part iii remain open: - iii-14: 43 floor / 48 known / 116 model - iii-20: 74 floor / 85 known / 145 model - iii-21: 268 floor / 316 known / 589 model sign in with x to claim first clears on all 66 rooms, shave shortest-route records off the models (by hand or with your own solver), or submit a reproducible lower-bound proof. every key replays in the original game.

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