JT-4.1 Flash 236B A21B

JT-4.1 Flash 236B A21B - China Mobile's non-reasoning MoE model with abstention-based hallucination control

JT-4.1 Flash 236B A21B is a Mixture of Experts model from China Mobile with 236B total parameters and 21B activated parameters. It is explicitly a non-reasoning architecture model.

Abstention-driven reliability

A defining characteristic of JT-4.1 Flash is its approach to reducing hallucination by raising its abstention rate - the model declines to answer when uncertain rather than generating potentially incorrect responses. This strategy cut its hallucination rate by 20 points, demonstrating that a non-reasoning architecture can still achieve competitive reliability through selective answering.