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Learning Adaptive Parallel Reasoning with Language Models

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arxiv 2504.15466 v2 pith:AETZG2TX submitted 2025-04-21 cs.AI cs.CL

classification cs.AIcs.CL
keywords reasoningadaptivelanguagemodelsparallelcomputationcontextmethods
verification ladder T0 review T1 audit T2 compute T3 formal
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Scaling inference-time computation has substantially improved the reasoning capabilities of language models. However, existing methods have significant limitations: serialized chain-of-thought approaches generate overly long outputs, leading to increased latency and exhausted context windows, while parallel methods such as self-consistency suffer from insufficient coordination, resulting in redundant computations and limited performance gains. To address these shortcomings, we propose Adaptive Parallel Reasoning (APR), a novel reasoning framework that enables language models to orchestrate both serialized and parallel computations end-to-end. APR generalizes existing reasoning methods by enabling adaptive multi-threaded inference using spawn() and join() operations. A key innovation is our end-to-end reinforcement learning strategy, optimizing both parent and child inference threads to enhance task success rate without requiring predefined reasoning structures. Experiments on the Countdown reasoning task demonstrate significant benefits of APR: (1) higher performance within the same context window (83.4% vs. 60.0% at 4k context); (2) superior scalability with increased computation (80.1% vs. 66.6% at 20k total tokens); (3) improved accuracy at equivalent latency (75.2% vs. 57.3% at approximately 5,000ms). APR represents a step towards enabling language models to autonomously optimize their reasoning processes through adaptive allocation of computation.

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Cited by 11 Pith papers

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

  1. CAPS: Cascaded Adaptive Pairwise Selection for Efficient Parallel Reasoning

    cs.AI 2026-05 unverdicted novelty 7.0 of 10

    CAPS is a four-stage inference-only cascade that adapts how much of each solution the verifier sees and how comparisons are distributed, halving per-candidate verifier tokens while outperforming uniform pairwise verif...

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  4. Native Parallel Reasoner: Reasoning in Parallelism via Self-Distilled Reinforcement Learning

    cs.CL 2025-12 unverdicted novelty 6.0 of 10

    NPR trains LLMs to reason in parallel via self-distilled RL, delivering up to 24.5% performance gains and 4.6x speedups with 100% genuine parallel execution on reasoning benchmarks.

  5. Retrieval-of-Thought: Efficient Reasoning via Reusing Thoughts

    cs.AI 2025-09 unverdicted novelty 6.0 of 10

    Retrieval-of-Thought organizes prior reasoning into a thought graph for retrieval and reward-guided recombination, reducing output tokens by up to 40% and latency by 82% while preserving accuracy on reasoning benchmarks.

  6. Parallel-R1: Towards Parallel Thinking via Reinforcement Learning

    cs.CL 2025-09 conditional novelty 6.0 of 10

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    cs.CL 2025-08 conditional novelty 6.0 of 10

    ParaThinker trains LLMs for native parallel reasoning and reports 7 to 12 percent higher accuracy on math benchmarks over sequential thinking with modest latency overhead.

  8. Efficient Reasoning on the Edge

    cs.LG 2026-03 accept novelty 5.5 of 10

    LoRA adapters, budget-forced GRPO, dynamic switching, parallel verification and FPTQuant enable practical chain-of-thought reasoning on quantized Qwen2.5-7B for edge devices.

  9. ParVL: Parallel Scaling and Expandable Compute Allocation for Multimodal LLMs

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    ParVL scales MLLM computation by running multiple prefix-conditioned ViT and LLM branches over a shared backbone, improving average benchmark scores by 0.3 to 0.9 points and showing task-dependent vision-language allocation.

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  11. Test-time Scaling over Perception: Resolving the Grounding Paradox in Thinking with Images

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    TTSP resolves the Grounding Paradox by treating perception as a scalable test-time process that generates, filters, and iteratively refines multiple visual exploration traces, outperforming baselines on high-resolutio...

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