In plain words: It stores examples in a running memory and solves queries with repeated silent steps in its internal space, not written-out reasoning. On the ARC-AGI-1 puzzles it solved 29.5% of tasks for under a tenth of a cent, a better cost-accuracy mix than before.
Abstract · BDH-CQ: In-Context Learning with Recurrent Latent Reasoning
We introduce BDH-CQ, a reasoning model that combines in-context learning with recurrent latent reasoning. Inputs presented at inference time continuously update the model's recurrent memory; the model then solves a query through iterative computation in a high-dimensional latent space, without verbalizing its intermediate reasoning. We evaluate the model on the public ARC-AGI-1 evaluation set and use controlled ARC-like interventions to study what it learns from demonstrations, how consistently it applies an inferred transformation, and which concepts remain difficult. A 150M-parameter configuration reaches 29.5% pass@2 at a computed inference cost of \$0.0007 per task. This operating point breaks through the previously reported ARC-AGI-1 cost-accuracy Pareto frontier, establishing a new state of the art in benchmark cost efficiency.
Björn Engdahl, Adrian Kosowski, Jan Chorowski, Zuzanna Stamirowska, Przemysław Uznański, Junlin Jiang, Rohan Phadke, Remigiusz Kinas, Richard Zhong
arXiv:2608.09888 · cs.NE, cs.AI, cs.LG, stat.ML · submitted Aug 10, 2026
abstract · pdf · html · https://github.com/pathwaycom/arc-task-gen