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cs.AI2026
The Deterministic Horizon: When Extended Reasoning Fails and Tool Delegation Becomes Necessary
Dongxin Guo, Jikun Wu, Siu Ming Yiu
Extended chain-of-thought reasoning can degrade performance on deterministic state-tracking tasks, not solely because of preference biases but, on the evidence we present, because…
cs.AI2026
FinGround: Detecting and Grounding Financial Hallucinations via Atomic Claim Verification
Dongxin Guo, Jikun Wu, Siu Ming Yiu
Financial AI systems must produce answers grounded in specific regulatory filings, yet current LLMs fabricate metrics, invent citations, and miscalculate derived quantities. These…
cs.AI2026
Geometric Metrics for MoE Specialization: From Fisher Information to Early Failure Detection
Dongxin Guo, Jikun Wu, Siu Ming Yiu
Expert specialization is fundamental to Mixture-of-Experts (MoE) model success, yet existing metrics (cosine similarity, routing entropy) lack theoretical grounding and yield incon…