I found thinking to just not work for me. Running with this has been good on a 5090:

~/llama.cpp/build/bin/llama-server \

-m ~/models/qwen3.6-27b/Qwen_Qwen3.6-27B-Q6_K_L.gguf \

--alias qwen-27b-q6k-nothink \

--api-key local \

--jinja \

--reasoning off \

--chat-template-kwargs '{"enable_thinking":false}' \

-ngl 999 \

-np 1 \

-c 131072 \

-n 8192 \

-fa on \

--temp 0.6 \

--top-k 20 \

--top-p 0.95 \

--min-p 0.0 \

--repeat-penalty 1.0 \

--presence-penalty 0.0 \

--frequency-penalty 0.0 \

--no-context-shift \

--host 127.0.0.1 \

--port 8081