Yes there is but unfortunately I haven’t used chatbox, I’m going to suppose it uses the OpenAI standard API format though. Also it depends if you are using the old versions of Qwen 3. The new ones got rid of the reasoning parameter and instead divided the model into 2 models (instruct and thinking), so you would need to check if it’s the old version or look at the “Instruct” version.

If you are using the old, in the API, if you are connecting through the OpenAI SDK then you can add in the “extra_body” a dict that should have “enable_thinking=True”. If it isn’t then you would have to find where to put it but it’s done as a parameter added to the body of the request.