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Effectively Controlling Reasoning Models through Thinking Intervention

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arxiv 2503.24370 v3 pith:ZQKBAEV4 submitted 2025-03-31 cs.LG cs.AIcs.CL

Effectively Controlling Reasoning Models through Thinking Intervention

classification cs.LG cs.AIcs.CL
keywords reasoningthinkinginterventionmodelsinstructionllmscontrollingdemonstrate
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Reasoning-enhanced large language models (LLMs) explicitly generate intermediate reasoning steps prior to generating final answers, helping the model excel in complex problem-solving. In this paper, we demonstrate that this emerging generation framework offers a unique opportunity for more fine-grained control over model behavior. We propose Thinking Intervention, a novel paradigm designed to explicitly guide the internal reasoning processes of LLMs by strategically inserting or revising specific thinking tokens. We find that the Thinking Intervention paradigm enhances the capabilities of reasoning models across a wide range of tasks, including instruction following on IFEval and Overthinking, instruction hierarchy on SEP, and safety alignment on XSTest and SorryBench. Our results demonstrate that Thinking Intervention significantly outperforms baseline prompting approaches, achieving up to 6.7% accuracy gains in instruction-following scenarios, 15.4% improvements in reasoning about instruction hierarchies, and a 40.0% increase in refusal rates for unsafe prompts using open-source DeepSeek R1 models. Overall, our work opens a promising new research avenue for controlling reasoning LLMs.

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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. Plans Don't Persist: Why Context Management Is Load Bearing for LLM Agents

    cs.AI 2026-06 unverdicted novelty 7.0

    Replay pairing shows LLM agents do not persist plans in hidden states but rely on plans remaining in context, with rapid signal decay and task performance drops when plans are evicted.

  2. Steering Instruction Hierarchies at Inference Time

    cs.CL 2026-07 conditional novelty 6.0

    V-Steer boosts system-prompt value spans and suppresses conflicting user spans, raising controlled instruction-hierarchy adherence from under 18% to as high as 92%.

  3. Where Instruction Hierarchy Breaks: Diagnosing and Repairing Failures in Reasoning Language Models

    cs.AI 2026-06 unverdicted novelty 6.0

    A diagnostic framework localizes instruction hierarchy failures in LLMs into identification, resolution, and realization, while self-monitors reduce non-compliance by 81-99%.

  4. TALAN: Task-Aligned Latent Adaptation Networks for Targeted Post-Training of Large Language Models

    cs.LG 2026-06 unverdicted novelty 6.0

    TALAN inserts a trainable latent memory path that remixes sequence information into small orthogonal perturbations, delivering 1.41-1.85 point average gains over matched LoRA and DoRA on four Qwen backbones and STEM/c...

  5. Behavior Cue Reasoning: Monitorable Reasoning Improves Efficiency and Safety through Oversight

    cs.AI 2026-05 conditional novelty 6.0

    Behavior Cue Reasoning trains LLMs to emit special tokens before behaviors, enabling monitors to cut up to 50% wasted reasoning tokens and recover safe actions from 80% of unsafe traces, more than doubling success rat...

  6. Behavior Cue Reasoning: Monitorable Reasoning Improves Efficiency and Safety through Oversight

    cs.AI 2026-05 unverdicted novelty 6.0

    Behavior Cue Reasoning trains LLMs to emit special tokens before behaviors, enabling monitors to prune up to 50% of wasted tokens and recover safe actions from 80% of unsafe traces, more than doubling success rates wi...

  7. Evaluation Awareness in Language Models Has Limited Effect on Behaviour

    cs.CL 2026-05 conditional novelty 6.0

    Verbalised evaluation awareness in large reasoning models has only small effects on their outputs across safety and alignment tests.

  8. Thinking Sparks!: Emergent Attention Heads in Reasoning Models During Post Training

    cs.AI 2025-09 unverdicted novelty 6.0

    Post-training on reasoning tasks sparks the emergence of specialized attention heads that enable structured computation, with SFT adding stable heads while GRPO uses dynamic activation and pruning tied to reward signa...

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

    cs.AI 2025-09 unverdicted novelty 6.0

    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.

  10. ReasoningGuard: Safeguarding Large Reasoning Models with Inference-time Safety Aha Moments

    cs.CL 2025-08 unverdicted novelty 6.0

    ReasoningGuard is an inference-time method that uses attention mechanisms to inject safety aha moments and scaling sampling to defend large reasoning models against jailbreak attacks.

  11. The Periodic Table of LLM Reasoning: A Structured Survey of Reasoning Paradigms, Methods, and Failure Modes

    cs.CL 2026-06 unverdicted novelty 4.0

    A literature survey that introduces a taxonomy for LLM reasoning paradigms, analyzes methodological trends, and synthesizes failure modes from over 300 papers.