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Neuron Explorer
Neuron Explorer is a steering-first neuron explorer for Qwen3.5-4B that pushes MLP neurons and browses results in a 3D view.
Neuron Explorer is a steering-first tool built for the Qwen3.5-4B model. It pushes every MLP neuron up and down across prompts, keeps every rollout, and displays the results over a 3D view of the model. Users can run it locally with MPS, CUDA, or CPU to access live steered chat, lenses, connections, and live inference. The interface includes a 3D map of layers, a ranked unit list, a neuron detail view with multi-turn chat, UMAP embeddings, and a Claude integration acting as an MCP server. It also provides various sweep scripts to calculate neuron stats, run sweeps, and build layouts.
Neuron Explorer at a glance
Key features
- 3D view of model layers with neuron maps
- Ranked unit lists by word-cluster mass
- Steered rollouts and multi-turn chat
- UMAP embeddings of layer rollouts
- Claude integration via MCP server
- Live inference and steering
- Neuron connection and lens analysis
Use it for
- Explore individual MLP neurons in Qwen3.5-4B
- Run live steered chat and inference
- Analyze neuron activations and logit lenses
- Execute sweep scripts for model statistics
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