PSA: Having issues with Qwen3.5 overthinking? Give it a tool, and it can help dramatically.

I'm sure everyone has seen the posts from people talking about Qwen 3.5 over-thinking, or maybe you've experienced it yourself. Considering we're like 2 months out from the release and I still see people talk about this issue, I decided it might be a good idea to put this thread out there. First, the obvious - make sure your sampling parameters are set correctly. This is the first part of the "fix" and relates to the presence_penalty value. Experiment a little if you're willing. This is something most of you here likely already know, too. So let's get to the "real" fix.