Reasoning variant of LongCat-Flash trained via large-scale RL. Rivals proprietary systems in complex logic and STEM benchmarks.

Outputs 2

LongCat-Flash-Thinking

model
Architecture MOE
Parameters 560B
Active params 27B

LongCat-Flash-Thinking: Scaling RL for Open Reasoning

paper

arXiv: 2509.18883

reasoningmoetrainingopen-weight

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