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Wei Dai

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Book Open access Sep 2026

Decentralized Learning with Communication-Efficient Learned Gradient Sketches

Decentralized learning eliminates single-point-of-failure risks inherent in parameter-server architectures, but its practical deployment is bottlenecked by the communication cost of exchanging full-precision gradients over peer-to-peer links. Existing compression techniques—random quantization, sparsification, and fixe...

Ze-Hua Cheng, Wei Dai, Jia-Hao Sun · 0 citations
#natural language process... Preprint Sep 2026

this-that-model-1.0: A typed decision model that decides in 30 ms, for a millionth of a cent

Software delegates more of its branches to models every year: which queue a ticket enters, whether a command is safe to run, whether a claim clears without a person. What the program needs back is not prose. It is one of n declared options and a number it can threshold. Today that costs a round trip to a frontier model...

Ze-Hua Cheng, Wei Dai, Jia-Hao Sun · 6 citations · ⚡2
#natural language process... Preprint Sep 2026

Euston: Training Away Mathematical Sycophancy Without Losing the Mathematics

Euston is presented, an 8B mathematical claim-verification model trained to resist the all-false composition of the official evaluation sets and the low precision implied at realistic error prevalence, which is principally the all-false composition of the official evaluation sets.

Ze-Hua Cheng, Wei Dai, Jia-Hao Sun · 0 citations
Jul 2026

Constraint-Anchored Reasoning Traces

Constraint-Anchored Reasoning Traces (CART) is proposed, a neuro-symbolic framework that trains MLLMs to interleave natural language reasoning steps with symbolic constraint assertions: lightweight, machine-checkable statements about visual content.

Zehua Cheng, Wei Dai, Jiahao Sun · 0 citations

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