Thinking with Nothinking Calibration: A New In-Context Learning Paradigm in Reasoning Large Language Models

• URL: http://arxiv.org/abs/2508.03363v2
• Date: Wed, 06 Aug 2025 03:38:01 GMT
• Title: Thinking with Nothinking Calibration: A New In-Context Learning Paradigm in Reasoning Large Language Models
• Authors: Haotian Wu, Bo Xu, Yao Shu, Menglin Yang, Chengwei Qin,
• Abstract summary: We propose Thinking with Nothinking (JointThinking) as an in-context learning (ICL) paradigm for Reasoning large language models (RLLMs)<n>Our method prompts the model to generate two answers in parallel: one in Thinking mode and the other in Nothinking mode.<n>JointThinking significantly outperforms few-shot chain-of-thought robustness (CoT) and majority voting with improved answer.
• Score: 23.642200042199484
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reasoning large language models (RLLMs) have recently demonstrated remarkable capabilities through structured and multi-step reasoning. While prior research has primarily focused on improving their training and inference strategies, their potential for in-context learning (ICL) remains largely underexplored. To fill this gap, we propose Thinking with Nothinking Calibration (JointThinking), a new ICL paradigm that leverages the structured difference between two reasoning modes, i.e., Thinking and Nothinking, to improve reasoning accuracy. Specifically, our method prompts the model to generate two answers in parallel: one in Thinking mode and the other in Nothinking mode. A second round of Thinking is triggered only when the two initial responses are inconsistent, using a single prompt that incorporates the original question and both candidate answers. Since such disagreement occurs infrequently (e.g., only 6\% in GSM8K), our method performs just one round of reasoning in most cases, resulting in minimal latency overhead. Extensive experiments across multiple reasoning benchmarks demonstrate that JointThinking significantly outperforms few-shot chain-of-thought (CoT) and majority voting with improved answer robustness. Moreover, It achieves comparable in-distribution performance to training-based SOTA method, while substantially outperforming on out-of-distribution tasks. We further conduct a systematic analysis of the calibration mechanism, showing that leveraging different reasoning modes consistently lowers the error rate and highlights the value of structural thinking diversity. Additionally, we observe that the performance gap between actual and ideal reasoning narrows as model size increases in the second round of thinking, indicating the strong scalability of our approach. Finally, we discuss current limitations and outline promising directions for future ICL research in RLLMs.

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