Challenge: Existing work on reducing CoT generation in reasoning impairs the necessary information for deriving the correct answer.
Approach: They propose a reasoning paradigm that takes CoT as a part of context to simplify the reasoning task for Large Language Models (LLMs).
Outcome: The proposed framework reduces the generation length of LLMs, but its effectiveness hinges on the efficiency and reliability of the contextual CoT generation.

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Chain-of-Thought Matters: Improving Long-Context Language Models with Reasoning Path Supervision (2025.findings-emnlp)

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Challenge: Recent advances in Large Language Models (LLMs) have highlighted the challenge of handling long-context tasks.
Approach: They propose a chain-of-thought framework that teaches models to generate high-quality reasoning paths for enhanced long-context performance.
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Think Less, Know More: State-Aware Reasoning Compression with Knowledge Guidance for Efficient Reasoning (2026.findings-acl)

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Challenge: Existing CoT compression methods struggle to balance accuracy and efficiency . long CoT reasoning also introduces an overthinking phenomenon, authors say .
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CAC-CoT: Connector-Aware Compact Chain-of-Thought for Efficient Reasoning Data Synthesis Across Dual-System Cognitive Tasks (2025.findings-emnlp)

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Challenge: Long chain-of-thought (CoT) prompting often slows or even degrades performance on fast, intuitive "System-1" tasks.
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SoftCoT: Soft Chain-of-Thought for Efficient Reasoning with LLMs (2025.acl-long)

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Challenge: Existing approaches to continuous-space reasoning focus on hard token decoding and suffer from catastrophic forgetting.
Approach: They propose a method that generates instance-specific soft thought tokens as the initial chain of thoughts and maps them into the LLM’s representation space via a trainable projection module.
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Self-Training Elicits Concise Reasoning in Large Language Models (2025.findings-acl)

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Challenge: Chain-of-thought reasoning has enabled large language models to use additional computation through intermediate tokens to solve complex tasks, but current models often generate more tokens than necessary to accomplish the task, incurring extraneous inference costs.
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Think Faster Than Words: Efficient LLM Chain-of-Thought Reasoning via Dynamic Shortcut Decoding (2026.acl-long)

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Challenge: Existing methods that prune or employ early stopping to reduce latency often compromise reasoning reliability.
Approach: They propose a shortcut decoding framework that integrates probes over internal hidden states with step-level entropy to detect convergence of reasoning during generation and adaptively selects between a fast-exit path and a stability-verified path to remove redundant steps while preserving answer correctness.
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Your Reasoning Model Knows What Counts: Self-Guided Chain-of-Thought Pruning for Efficient Reasoning (2026.acl-long)

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Challenge: Existing approaches to Chain-of-Thought reasoning are often degraded because they disregard the model’s intrinsic reasoning dependency.
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Markov Chain of Thought for Efficient Mathematical Reasoning (2025.naacl-long)

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Challenge: Existing studies have sought to enhance the mathematical reasoning capabilities of large language models.
Approach: They propose a Markov Chain of Thought (MCoT) that compresses previous reasoning steps into a simplified question.
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Pru-CoT: Towards Efficient Reasoning Distillation via Pruning Chain-of-Thought (2026.findings-acl)

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Challenge: Existing heuristics fail to capture global causal logic due to rigid rules and limited search spaces.
Approach: They propose a framework that extracts the essential logical structure from reasoning chains.
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ConCISE: Confidence-guided Compression in Step-by-step Efficient Reasoning (2025.emnlp-main)

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Challenge: Existing methods for fine-tuning-based compression suffer from verbose outputs, increasing computational overhead.
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