Challenge: Existing methods to determine whether to perform reasoning lack fine-grained mechanisms to adapt reasoning length to problem complexity.
Approach: They propose a difficulty-adaptive reasoning method that dynamically links reasoning length to the model’s perceived problem difficulty.
Outcome: The proposed method reduces average reasoning length by 50%, achieving higher efficiency without sacrificing accuracy.

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Challenge: Existing methods do not differentiate question difficulty when designing prompting methods for them.
Approach: They propose an adaptive method to improve large language models for reasoning problems by measuring question difficulty and tailoring demonstration set construction and difficulty-adapted retrieval strategies.
Outcome: The proposed method shows an absolute improvement of up to 5.5% on arithmetic reasoning, 7.4% on symbolic reasoning, and 2.3% on commonsense reasoning.
DAST: Difficulty-Adaptive Slow-Thinking for Large Reasoning Models (2025.emnlp-industry)

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Challenge: Recent advances in slow-thinking reasoning models have shown exceptional performance in complex reasoning tasks.
Approach: They propose a framework that enables models to automatically adjust Chain-of-Thought (CoT) length based on problem difficulty.
Outcome: The proposed framework penalizes inefficiency on simple problems while incentivizing deep reasoning for complex ones.
Towards Reliable Large Audio Language Model (2025.findings-acl)

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Challenge: Recent advances in large audio language models (LALMs) have demonstrated impressive results and promising prospects in universal understanding and reasoning across speech, music, and general sound.
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Towards Holistic Evaluation of Large Audio-Language Models: A Comprehensive Survey (2025.emnlp-main)

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Challenge: Recent advances in large audio-language models (LALMs) have expanded their impact beyond natural language processing (NLP) to multimodal domains.
Approach: They propose a systematic taxonomy for LALM evaluations, categorizing them into four dimensions based on their objectives: (1) General Auditory Awareness and Processing, (2) Knowledge and Reasoning, (3) Dialogue-oriented Ability, and (4) Fairness, Safety, and Trustworthiness.
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Think Just Enough: Leveraging Self-Assessed Confidence for Adaptive Reasoning in Language Models (2026.findings-eacl)

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Challenge: Recent advances in large reasoning models (LLMs) have shown remarkable capabilities in complex tasks such as mathematical problem solving and code generation.
Approach: They propose a method for optimizing reasoning length via self-assessed confidence.
Outcome: The proposed method improves computational efficiency without compromising answer quality.
AdapThink: Adaptive Thinking Preferences for Reasoning Language Models (2026.findings-acl)

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Challenge: Recent research has highlighted a significant inefficiency associated with the slow thinking paradigm . models often overthink simple tasks while underthinking complex challenges .
Approach: They propose a framework for adaptive reasoning preference control that dynamically adjusts reflection preferences based on group-level distributional statistics of reasoning length and reflection intensity.
Outcome: The proposed framework reduces average response length by 17.1%-21.4% while improving performance by 6.12-6.59 points under 32K token budgets.
CAT: Confidence-Adaptive Thinking for Efficient Reasoning of Large Reasoning Models (2026.acl-industry)

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Challenge: Existing compression methods for large reasoning models rely on uniform length reduction or coarse-grained difficulty estimation, often leading to performance degradation on difficult problems.
Approach: They propose a framework that incorporates model’s intrinsic self-certainty signals as confidence into the preference optimization process, which autonomously modulates reasoning lengths based on problem difficulty.
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Correct, Concise and Complete: Multi-stage Training For Adaptive Reasoning (2026.findings-acl)

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Challenge: Large language models (LLMs) increase test-time computation, often in the form of chain-of-thought (CoT) however, reasoning traces can become unnecessarily long, increasing computation costs without improving accuracy and sometimes even degrading performance.
Approach: They propose a multi-stage efficient reasoning method that combines supervised fine-tuning with reinforcement learning using an adaptive length penalty.
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When to Continue Thinking: Adaptive Thinking Mode Switching for Efficient Reasoning (2025.findings-emnlp)

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Challenge: Large reasoning models (LRMs) incur excessive computational overhead due to redundant reasoning, especially on simple tasks.
Approach: They propose an Adaptive Self-Recovery Reasoning framework that suppresses unnecessary reasoning and enables implicit recovery.
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Think How to Think: Mitigating Overthinking with Autonomous Difficulty Cognition in Large Reasoning Models (2026.acl-long)

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Challenge: Recent Large Reasoning Models (LRMs) excel at complex reasoning tasks but often suffer from overthinking.
Approach: They propose a two-stage fine-tuning strategy that progressively inspires LRMs’ difficulty cognition and redundancy cognition of LRM.
Outcome: The proposed model significantly reduces inference costs by over 70% on easy tasks and 40% on complex ones without compromising performance.

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