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This research introduces CHARM, a hybrid model that leverages structured task memory and synthetic data augmentation to significantly boost performance on ARC-style reasoning benchmarks. By employing compositional sparse embeddings, the approach reduces task-memory parameters by over 90% while maintaining high accuracy, offering a more efficient path toward scalable recurrent reasoning systems. The findings demonstrate that balancing recurrent depth with learning horizon is critical for optimizing model capacity without relying solely on massive backbones.
Sources coveringarXiv, LessWrong, NVIDIA
What this isA model's reading of the article and related coverage, written for aiqbench. Not the publisher's words.

Structured Sparse Memory for Recurrent Reasoning

arXiv2 min read

arXiv:2609.33270v1 Announce Type: new Abstract: Recurrent models trained from scratch have recently become competitive on ARC-style reasoning tasks, but the usual framing around small recurrent backbones overlooks two important parts of the system: task-conditioned memory and synthetic augmentation data. We study this regime through CHARM, a compact hybrid ARC model that combines recurrent reasoning with structured task memory, synthetic data, and inference-time aggregation. In existing approaches, task-conditioned memory supplies a large hidden source of capacity, reaching more than 30x the size of the recurrent backbone. We introduce a compositional sparse embedding (CoSE) for task conditioning that reduces learned task-memory parameters by over 90% while improving pass@2 in controlled ARC ablations. For the recurrent backbone, recurrent depth helps only when balanced with learning horizon. Combining these ingredients, our system reaches 84% pass@2 on ARC-AGI-1 and 46.7% pass@2 on ARC-AGI-2 public evaluation. The benefits of structured memory also generalize to unseen puzzles and other domains. Our code, dataset, and model checkpoints are available at https://github.com/water-vapor/charm.

Abstract:Recurrent models trained from scratch have recently become competitive on ARC-style reasoning tasks, but the usual framing around small recurrent backbones overlooks two important parts of the system: task-conditioned memory and synthetic augmentation data. We study this regime through CHARM, a compact hybrid ARC model that combines recurrent reasoning with structured task memory, synthetic data, and inference-time aggregation. In existing approaches, task-conditioned memory supplies a large hidden source of capacity, reaching more than 30x the size of the recurrent backbone. We introduce a compositional sparse embedding (CoSE) for task conditioning that reduces learned task-memory parameters by over 90% while improving pass@2 in controlled ARC ablations. For the recurrent backbone, recurrent depth helps only when balanced with learning horizon. Combining these ingredients, our system reaches 84% pass@2 on ARC-AGI-1 and 46.7% pass@2 on ARC-AGI-2 public evaluation. The benefits of structured memory also generalize to unseen puzzles and other domains. Our code, dataset, and model checkpoints are available at this https URL.

Artificial Intelligence (cs.AI)

arXiv:2609.33270 [cs.AI]

(or arXiv:2609.33270v1 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2609.33270 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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Full text under the publisher's open licence · 254 words

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