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Neuron Explorer lets you poke Qwen3.5's hidden switches
What is neuron-explorer?
It loads the Qwen3.5-4B model, pushes each MLP neuron up and down on a few prompts, and saves every rollout. An interactive 3-D UI shows the neurons as points you can hover, click, and even steer in a live chat.
Who it is for
Prompt engineers and model-interpretability researchers can explore and steer individual neurons to diagnose behavior or design targeted prompts.