<ul><li>Recent advances in inference-time compute have improved performance on complex tasks using Large Reasoning Models (LRMs).</li><li>The high inference latency is a trade-off for improved accuracy due to the length of generated reasoning sequences and autoregressive decoding.</li><li>SpecReason is a system that accelerates LRM inference by using a lightweight model to carry out simpler intermediate reasoning steps.</li><li>SpecReason achieves 1.5-2.5x speedup over vanilla LRM inference while improving accuracy by 1.0-9.9%.</li></ul>

SpecReason: Fast and Accurate Inference-Time Compute via Speculative Reasoning

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