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Don't Overthink It: A Survey of Efficient R1-style Large Reasoning Models

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arxiv 2508.02120 v1 pith:KPXZUX33 submitted 2025-08-04 cs.AI

Don't Overthink It: A Survey of Efficient R1-style Large Reasoning Models

classification cs.AI
keywords reasoningmodelsefficientmodelcollaborationlargemethodsperformance
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Recently, Large Reasoning Models (LRMs) have gradually become a research hotspot due to their outstanding performance in handling complex tasks. Among them, DeepSeek R1 has garnered significant attention for its exceptional performance and open-source nature, driving advancements in the research of R1-style LRMs. Unlike traditional Large Language Models (LLMs), these models enhance logical deduction and decision-making capabilities during reasoning by incorporating mechanisms such as long chain-of-thought and self-reflection through reinforcement learning. However, with the widespread application of these models, the problem of overthinking has gradually emerged. Specifically, when generating answers, these models often construct excessively long reasoning chains with redundant or repetitive steps, which leads to reduced reasoning efficiency and may affect the accuracy of the final answer. To this end, various efficient reasoning methods have been proposed, aiming to reduce the length of reasoning paths without compromising model performance and reasoning capability. By reviewing the current research advancements in the field of efficient reasoning methods systematically, we categorize existing works into two main directions based on the lens of single-model optimization versus model collaboration: (1) Efficient Reasoning with Single Model, which focuses on improving the reasoning efficiency of individual models; and (2) Efficient Reasoning with Model Collaboration, which explores optimizing reasoning paths through collaboration among multiple models. Besides, we maintain a public GitHub repository that tracks the latest progress in efficient reasoning methods.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. DELTA: Dynamic Layer-Aware Token Attention for Efficient Long-Context Reasoning

    cs.CL 2025-10 conditional novelty 7.0

    DELTA partitions layers into full, delta, and sparse groups to select salient tokens via aggregated attention scores, matching full-attention accuracy on AIME and GPQA while cutting attended tokens up to 4.25x and ach...

  2. Breaking the Reward Barrier: Accelerating Tree-of-Thought Reasoning via Speculative Exploration

    cs.LG 2026-05 unverdicted novelty 6.0

    SPEX accelerates Tree-of-Thought LLM reasoning 1.2-3x via speculative path selection, dynamic budget allocation across queries, and adaptive early termination, with up to 4.1x when combined with token speculative decoding.

  3. Breaking the Reward Barrier: Accelerating Tree-of-Thought Reasoning via Speculative Exploration

    cs.LG 2026-05 unverdicted novelty 6.0

    SPEX delivers 1.2-3x speedup on ToT algorithms via speculative path selection, dynamic budget allocation, and adaptive early termination, reaching up to 4.1x when combined with token-level speculative decoding.

  4. HiRO-Nav: Hybrid ReasOning Enables Efficient Embodied Navigation

    cs.AI 2026-04 unverdicted novelty 6.0

    HiRO-Nav adaptively triggers reasoning only on high-entropy actions via a hybrid training pipeline and shows better success-token trade-offs than always-reason or never-reason baselines on the CHORES-S benchmark.

  5. FlowEvo: Self-Evolving Agents through the Co-Evolution of Workflows and Executable Skills

    cs.AI 2026-04 conditional novelty 5.0

    FlowEvo compiles successful agent workflows into executable skill records and reuses them at inference time, reporting the best accuracy-cost tradeoff across ALFWorld, HumanEval, and GSM8K among tested baselines.

  6. Implicit Reasoning in Large Language Models: A Comprehensive Survey

    cs.CL 2025-09 conditional novelty 5.0

    A survey organizing implicit (silent) reasoning in LLMs into three execution paradigms, plus evidence, benchmarks, and challenges.