Tool to export models with tweaked J-Space behavior
A tool based on Anthropic's Jacobian-Lens that allows users to manually tweak a model's Jacobian space (J-Space) and export a modified model with altered behavior. It enables manual behavior modification and abliteration using human input, demonstrated by creating a model called Nikusui-v1.
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Interactive Jacobian-Lens visualizer and live steerer for GGUF models on llama.cpp
A tool that visualizes and steers GGUF models using the Jacobian lens technique, built on llama.cpp. It allows users to observe and modify model internals in real time, solving the lack of such tools for GGUF format models.
Community applies Anthropic's J-space lens to open Qwen3-8B for agent guardrails
A Reddit user replicated Anthropic's J-space research on the open-source Qwen3-8B model, using a Jacobian lens to detect silent internal reasoning before tool calls. They then wired this into agent guards to intercept prose drift (e.g., leaning toward natural language instead of JSON), enabling stop/cancel/keep decisions.
Community stress-tests Anthropic's J-Space hallucination signal on Qwen3-4B across 7 datasets
A developer mapped Anthropic's J-Space hallucination detection method onto Qwen3-4B, testing it across ~11,400 examples from 7 datasets. The work builds on Anthropic's paper and an open-source implementation by solarkyle, aiming to assess whether internal workspace entropy is a deployable hallucination detector.
↑ Updated Sun, Jul 12, 2026, 05:06 AM — Stress-test results across 7 datasets posted on Reddit.
Recreation of MU/TH/UR 6000 UI from Alien using Fable and Claude
A fan recreation of the fictional MU/TH/UR 6000 interface from the Alien franchise, built using Fable (a generative UI tool) and Claude. The creator, a React developer, used natural language prompts to generate the UI with minimal coding, demonstrating how LLMs can assist in rapid prototyping of complex animated interfaces.
Anthropic reveals J-space inside Claude Opus 4.6, offering clearest view yet of LLM internal reasoning
Anthropic developed the Jacobian lens (J-lens) to uncover a hidden area called J-space inside Claude Opus 4.6, revealing individual words related to the model's output. Separately, a researcher released the BABEL codec for GPT-2 small, achieving 94.7% behavior reconstruction and enabling bidirectional reading/writing of the model's internal state. These advances give practitioners unprecedented insight into how language models think.