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OpenInterpretability

Open-source toolkit to audit what your LLM knows

Open Source
Developer Tools
Artificial Intelligence
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Hunted byCaio VicentinoCaio Vicentino

The first mech interp toolkit that runs inside Claude Code, Cursor, and Cline via MCP. Production probes (FabricationGuard, agent-probe-guard) catch hallucinations + agent failures. ProbeBench leaderboard, SAE training from 30-min free Colab to paper-grade. Apache-2.0.

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Hey PH, Caio here, maker of OpenInterpretability.

When something breaks inside an LLM app — hallucination, silent agent failure, "works on prompt A but not on prompt B" — you usually have no way to see inside the model. Mech interp can answer those questions, but the tools have been research-only: H100s, deep domain knowledge, weeks of setup.

So I built the first mech interp MCP server. It plugs straight into Claude Code, Cursor, and Cline. Once installed, your AI assistant can call interpretability tools directly during a session — capture activations, look up SAE features, run probes, test causal interventions. No separate notebook, no context switch.

→ One-line install: openinterp.org/start

Two production probes ship with it today:

FabricationGuard — drop-in hallucination detector on Qwen3.6-27B. → openinterp.org/products/fabricationguard

agent-probe-guard — detects silent coding-agent failures with Qwen 3.6 27b. ~18% budget cut at 86% accuracy.

→ pip install openinterp All Apache-2.0. What I'd love feedback on: - Which IDE workflow would you want this in next? - What LLM failure mode do you wish you could actually see into?

Happy to answer anything.

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About OpenInterpretability on Product Hunt

Open-source toolkit to audit what your LLM knows

OpenInterpretability was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #75 on the daily leaderboard. The first mech interp toolkit that runs inside Claude Code, Cursor, and Cline via MCP. Production probes (FabricationGuard, agent-probe-guard) catch hallucinations + agent failures. ProbeBench leaderboard, SAE training from 30-min free Colab to paper-grade. Apache-2.0.

OpenInterpretability was featured in Open Source (68.4k followers), Developer Tools (512.4k followers) and Artificial Intelligence (468.5k followers) on Product Hunt. Together, these topics include over 173.3k products, making this a competitive space to launch in.

Who hunted OpenInterpretability?

OpenInterpretability was hunted by Caio Vicentino. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.

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