logitlens

Type a prompt, pick a small language model, run one real forward pass — entirely in your browser, via transformers.js (WASM/ONNX), no server inference — and see the actual probability distribution the model puts over every possible next token. Prompted by a thread asking whether next-token logits get "absurdly skewed" when a model is mid-way through repeating text verbatim. Now you can just check.

top token
 
entropy
bits over the full vocab
effective choices
2^entropy — a "how many tokens feel live" count
Click any token to append it to the prompt and step forward one token — a quick way to watch the distribution stay skewed (or not) across a run.