aiqbench analysis
AdaThink-Med introduces an adaptive reasoning framework for medical LLMs that dynamically adjusts computational effort based on uncertainty, significantly reducing token usage without sacrificing diagnostic accuracy. By integrating entropy-based estimation into reinforcement fine-tuning, the system efficiently allocates resources between rapid responses and complex analysis within a single model architecture. This approach addresses critical latency constraints in healthcare while optimizing inference costs across standard large language models.
AdaThink-Med: Optimizing Inference-Time Compute for Medical Reasoning via Uncertainty Quantification
arXiv:2509.24560v2 Announce Type: replace-cross Abstract: Extended Chain-of-Thought (CoT) reasoning has significantly bolstered the capabilities of medical large language models (LLMs). However, current models exhibit static computational expenditure, applying lengthy reasoning processes indiscriminately to both simple queries and complex diagnostic cases. This inefficiency is particularly prohibitive in real-world healthcare, where clinical scenarios range from time-sensitive emergencies requiring rapid response to intricate pathologies demanding deep analysis. To address this, we propose \textbf{AdaThink-Med}\footnote{Code available at https://github.com/shaohao011/AdaThinkMed}, an end-to-end framework for adaptive reasoning via uncertainty-guided length calibration. Although the underlying mechanism is generalizable, we demonstrate its critical value in the medical domain, where balancing inference latency with diagnostic precision is paramount. AdaThink-Med leverages entropy-based uncertainty estimation within reinforcement fine-tuning to dynamically shape reward signals: it penalizes verbosity for high-confidence correct answers (e.g., straightforward knowledge retrieval) while incentivizing extended exploration for uncertain or ambiguous scenarios. Across six medical benchmarks, AdaThink-Med reduces inference token consumption by \textbf{4.7$\times$ to 6.4$\times$} on Qwen and Llama architectures, respectively, with minimal performance trade-offs. Notably, our reward design naturally produces distinct ``non-thinking'' and ``thinking'' modes within a single model, enabling efficient allocation of computational resources without any external router or classifier.
Abstract:Extended Chain-of-Thought (CoT) reasoning has significantly bolstered the capabilities of medical large language models (LLMs). However, current models exhibit static computational expenditure, applying lengthy reasoning processes indiscriminately to both simple queries and complex diagnostic cases. This inefficiency is particularly prohibitive in real-world healthcare, where clinical scenarios range from time-sensitive emergencies requiring rapid response to intricate pathologies demanding deep analysis. To address this, we propose \textbf{AdaThink-Med}\footnote{Code available at this https URL}, an end-to-end framework for adaptive reasoning via uncertainty-guided length calibration. Although the underlying mechanism is generalizable, we demonstrate its critical value in the medical domain, where balancing inference latency with diagnostic precision is paramount. AdaThink-Med leverages entropy-based uncertainty estimation within reinforcement fine-tuning to dynamically shape reward signals: it penalizes verbosity for high-confidence correct answers (e.g., straightforward knowledge retrieval) while incentivizing extended exploration for uncertain or ambiguous scenarios. Across six medical benchmarks, AdaThink-Med reduces inference token consumption by \textbf{4.7$\times$ to 6.4$\times$} on Qwen and Llama architectures, respectively, with minimal performance trade-offs. Notably, our reward design naturally produces distinct ``non-thinking'' and ``thinking'' modes within a single model, enabling efficient allocation of computational resources without any external router or classifier.
Computation and Language (cs.CL); Artificial Intelligence (cs.AI)
arXiv:2509.24560 [cs.CL]
(or arXiv:2509.24560v2 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2509.24560 Focus to learn more arXiv-issued DOI via DataCite
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