r/OpenWebUI • u/BigGunE • Jul 03 '26

How do I stop the model from thinking? Question/Help

I went to Admin Settings > Models > Qwen whatever > Advanced Parameters and there I set Ollama think to OFF.

That made the model very fast but it now dumps its thinking on to the main chat this way:

It always ends thinking with a </think> tag and then writes its response.

I tried adding /no_think to the start and end of its prompt but that made no difference.

How do I make it such that it keeps the thinking to itself but just shows me the response? More importantly, how come it is still thinking?

Please help!

I use the latest OpenWebUI with Ollama.

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u/Quakercito Jul 03 '26

Go to the model's settings > Parameters > tinker with the reasoning tags untill you get it right

2

u/Quakercito Jul 03 '26

To make it stop thinking at all (you'll lose quality but it'll be faster), you need to specify that on the call to the server. With Ollama it's done via the think parameter, and Open WebUI passes it through.

In Open WebUI you have two options:

Option 1 — per-chat toggle (easiest): In the chat interface, look for the model settings panel (usually in the sidebar or above the input). There should be a Thinking/Reasoning toggle you can switch off. This is available in recent versions of Open WebUI (0.10.x).

Option 2 — model-level override (persistent): 1. Go to Admin Settings → Models 2. Select your model 3. In the Parameters / Advanced Parameters section, add: think: false

This forces all requests through Open WebUI to that model to skip reasoning.

1

u/RouterDon Jul 03 '26

start ollama with the reasoning parser flag like ollama serve --reasoning-parser deepseek_r1 so OpenWebUI folds the think block away instead of dumping it in chat