TEFM: Token-Efficient Faithful Modeling for Structured Data

Abstract:In this paper, we solve two fundamental obstacles in applying LLMs to critical domains: token efficiency and faithfulness. To address both constraints jointly, we present TEFM (Token-Efficient Faithful Modeling), a framework designed for structured data analysis in critical domains. TEFM achieves token efficiency by compressing lengthy structured observations into compact Behavioral Code tokens, dramatically reducing token consumption with minimal information loss. Moreover, TEFM enables faithful rationalization through a dual-fidelity objective that jointly optimizes code-level reconstruction and prediction-level fidelity, identifying minimal sufficient feature subsets grounded in input data. Comprehensive experiments across various domain datasets and model backbones (Qwen3, Gemma-2, Phi-4) show that TEFM achieves competitive classification accuracy with dramatic token reduction (approximately 1\% token retention in clinical and 2\% in security domains) while producing faithful rationales.

Computation and Language (cs.CL); Machine Learning (cs.LG)

arXiv:2609.09552 [cs.CL]

(or arXiv:2609.09552v1 [cs.CL] for this version)

https://doi.org/10.48550/arXiv.2609.09552 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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