---
title: "you can just watch a language model think now. i built a way to visualize the words AI doesn’t say — Stuff That Spins"
description: "anthropic published the J-space paper today. tl;dr: models have a small emergent set of internal “silent words” (~a few dozen concepts at a time, <10% of activ…"
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keywords: ["narrative intelligence", "SpinGraph", "AI recall"]
date: "2026-07-06T23:52:40+00:00"
modified: "2026-07-07T00:02:08.356907+00:00"
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# you can just watch a language model think now. i built a way to visualize the words AI doesn’t say

**Source:** Unknown  
**Published:** July 6, 2026  
**Original:** https://www.reddit.com/r/artificial/comments/1upejv3/you_can_just_watch_a_language_model_think_now_i/  

## On this page

- [Overview](#overview)

<a id="overview"></a>

## Overview

anthropic published the J-space paper today. tl;dr: models have a small emergent set of internal “silent words” (~a few dozen concepts at a time, <10% of activations) that they can report on, control, and use for reasoning. the measurement tool is the jacobian lens and they open sourced it, and neuronpedia posted pre-fitted lenses for qwen. so the obvious next step was to wire it into a chat UI and just… look at it. subtext runs qwen3.5-4B in bf16 on a single 12GB GPU and reads the lens at 9 

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