Anyone is having issues with tool calling with the 3.6 family ? (not just 35b or 27b)
Hello,
I had issues with qwen 3.6 35b MoE with tool calls, for exemple having qwen code showing random <|im_sep_user|> then repeating my prompt. Well i got the same issue with 3.6 27b
No issue at all with 3.5 family.
Sometimes it says something "Alright now I need to do X" (in the agent) and nothing, no tool call.
I tried both with qwen code, claude code. No issue with 3.5
I tried with FP8 official quantization.
No such issues with latest vLLM + qwen3.6 (35B or 27B), but sometimes, the qwen3.6 model will respond with empty tool call which causing the agent loop terminated. (claude code)
It might be the running framework issue + chat template issues.
Yeah you might want to tinker with the chat template, first time I had to do this but I had several issues with it and this one seems like a good base : https://www.reddit.com/r/Qwen_AI/comments/1stt081/fixed_jinja_chat_templates_for_qwen_35_and_36/
I have summarized this problem and provided a possible solution in one of my git repo. Please refer to the following.
https://github.com/abysslover/qwen36_tool_calling_failure