sgl-project/sglang

[Feature] Qwen3 Provide Ability to Turn off Thinking on server startup

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#5,948 opened on May 1, 2025

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good first issue

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Description

Checklist

Motivation

Currently, there is no easy way to turn off thinking on startup, at least as far as I can see in the docs.

Related resources

No response

Contributor guide

Research direction
Examine the server startup code to see where model configuration is passed, particularly how Qwen3's thinking mode is enabled. Add a new flag (e.g., disable thinking) that sets the appropriate parameter when initializing the model.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitPython
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75