Preprint
Aug 2026
GRPO for Financial Advice Generation: Outperforming Commercial LLMs under CATE Evaluation
It is demonstrated that GRPO with a finance-grounded reward signal can produce substantially more useful business recommendations than commercial LLMs, and that a judge-independent causal audit is a valuable complement to, rather than a confirmation of, LLM-as-a-judge assessment in financial NLP.
Ofir Ben Shoham, Shrutendra Harsola, Vignesh T. Subrahmaniam et al.
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