Challenge: Large reasoning models have exhibited strong performance on complex reasoning tasks, but current test-time scaling methods rely on redundant sampling and ignore historical experience utilization.
Approach: They propose a test-time scaling framework that coordinates three collaborative LRMs to iteratively explore and refine solutions guided by historical attempts.
Outcome: The proposed framework surpasses strong baselines on three mathematical reasoning benchmarks, including AIME-24, AIME-25, and OlymMATH.

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Challenge: Recent training-based TTS methods, such as continued reinforcement learning, have surged in popularity, while training-free TTS approaches are gradually fading from prominence.
Approach: They propose a fine-grained sequential scaling method guided by process verification that integrates training-free TTS methods with other classical parallel scaling methods at the step level.
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Chronos: Learning Temporal Dynamics of Reasoning Chains for Test-Time Scaling (2026.findings-acl)

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Challenge: Existing methods for testing time scales treat reasoning traces or tokens equally, ignoring substantial variations in trajectory quality and localized logical failures.
Approach: They propose a chronological reasoning scorer that models each trajectory as a time series.
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Test-Time Scaling in Multimodal Foundation Models: A Comprehensive Survey of Generation and Reasoning (2026.findings-acl)

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Challenge: Recent advances have adapted this paradigm to Multimodal Foundation Models (MFMs), unlocking their potential in multimodal reasoning and generation.
Approach: They propose a taxonomy framework that categorizes existing methodologies into three distinct strategies: sampling-based, feedback-based and search-based approaches.
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Video-RTS: Rethinking Reinforcement Learning and Test-Time Scaling for Efficient and Enhanced Video Reasoning (2025.emnlp-main)

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Challenge: Despite advances in reinforcement learning, data collection and fine-tuning remain costly and hard to scale.
Approach: They propose a video-adaptive test-time scaling strategy that combines RL with a supervised fine-tuning strategy to improve video reasoning capability.
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Learning to Reason Over Time: Timeline Self-Reflection for Improved Temporal Reasoning in Language Models (2025.acl-long)

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Challenge: Large Language Models struggle with temporal reasoning, which requires processing time-related information such as event sequencing, durations, and inter-temporal relationships.
Approach: They propose a framework that enhances the temporal reasoning abilities of Large Language Models (LLMs) by combining timeline construction with iterative self-reflection.
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Parallel Test-Time Scaling for Latent Reasoning Models (2026.acl-long)

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Challenge: Parallel test-time scaling is a pivotal approach for enhancing large language models.
Approach: They propose two uncertainty-inspired stochastic strategies for parallel test-time scaling for latent reasoning models and a Latent Reward Model for aggregation.
Outcome: The proposed model scales well with compute and enables effective trajectory selection.
START: Self-taught Reasoner with Tools (2025.emnlp-main)

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Challenge: Large Reasoning Models (LRMs) have demonstrated remarkable capabilities in complex reasoning through long chain-of-thought, yet they struggle with precise computations and algorithmic operations.
Approach: They propose a training-free approach that activates LRMs’ latent tool-use capabilities through artificial hints and a framework that enables models to learn effective tool utilization through diverse hint patterns and rejection-based data synthesis.
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Think Right, Not More: Test-Time Scaling for Numerical Claim Verification (2025.findings-emnlp)

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Challenge: Fact-checking real-world claims requires multistep reasoning and numerical reasoning . large language models are unable to understand nuance of numerical aspects .
Approach: They propose scaling test-time compute (TTS) for large language models to solve this problem . they train a verifier model to navigate the space of possible reasoning paths .
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SIFT: Grounding LLM Reasoning in Contexts via Stickers (2025.findings-emnlp)

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Challenge: Using a new approach, we can improve the pass@1 accuracy of LLM reasoning in large language models.
Approach: They propose a method that leverages increasing inference-time compute to ground LLM reasoning in contexts.
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Guided by Gut: Efficient Test-Time Scaling with Reinforced Intrinsic Confidence (2026.acl-long)

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Challenge: Guided by Gut (GG) is an efficient self-guided TTS framework for Large Language Models (LLMs) that performs step-by-step reasoning at a low cost without any reward models or verifiers.
Approach: They propose a self-guided TTS framework that enables LLMs to perform step-by-step reasoning at a low cost without any reward models or verifiers.
Outcome: Empirical evaluations show that GG performs better than TTS with PRMs while reducing GPU memory usage by up to 10.

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