Anecdotal but for some reason I had a pretty bad time with qwen3.5 locally for tool usage. I've been using GPT-OSS-120B successfully and switched to qwen so that I could process images as well (I'm using this for a discord chat bot).

Everything worked fine on GPT but Qwen as often as not preferred to pretend to call a tool and not actually call it. After much aggravation I wound up just setting my bot / llama swap to use gpt for chat and only load up qwen when someone posts an image and just process / respond to the image with qwen and pop back over to gpt when the next chat comes in.