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DeepSeek releases its toolbox of speculative decodings

DeepSeek AI has open-sourced their implementation of speculative decoding, a method for significantly speeding up LLM inference without modifying the underlying model.

01deepseek-ai/DeepSpec 2.6kPython

Speculative decoding is a method for accelerating LLM inference by using a small ‘draft’ model to generate a batch of tokens quickly, followed by a larger ‘target’ model which checks/corrects the entire batch in one forward pass. DeepSpec includes implementations of three training methods (DSpark, DFlash, and Eagle3), a data pipeline for constructing cached datasets, and an evaluation framework for evaluating on GSM8K, MATH, and HumanEval datasets. They also provide pre-trained draft checkpoints for the Qwen3 and Gemma target models, which have been validated on 8 GPU systems.

Why a vibe-coder should care

Using speculative decoding can reduce your inference costs if you have a local LLM instance or are paying per token on a cloud API. Since they also provide pre-trained draft checkpoints, you can get started right away by swapping in the draft checkpoints for Qwen3/Gemma models.

Open on GitHub