unslothai/unsloth

[Feature] Draft model / speculative decoding

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#4753 opened on Apr 1, 2026

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 (4 comments) (2 reactions) (0 assignees)Python (64,271 stars) (5,658 forks)batch import
feature requestgood first issuehelp wanted

Description

Can we have the possibility to select draft model in ui? Seems like an important feature, I wonder how fast would Qwen3.5 27b be if I used Qwen3.5 0.8b as draft model.

Contributor guide

Tech stack
python
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Understanding of speculative decodingFamiliarity with unsloth UI codePython basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Examine the unsloth UI codebase for model selection patterns, likely in the Gradio or Streamlit frontend. Check how the main model is loaded and configured, and identify where a draft model dropdown could be added. Look at the inference pipeline to understand how to pass a draft model. Review comments in issue #4753 for any additional context or design decisions from maintainers.