
Technology
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AI Interpretability
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YC W26
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Valuation:
Undisclosed

Last Updated:
March 24, 2026

Builds an interpretability and reasoning SDK that enables foundation model builders to inspect, steer, and control model behavior by operating within the model's latent space, targeting hallucination detection, model drift, and failure mode identification.
Beta SDK launched March 2026 with hallucination detection, degradation detection for robotic agents, and antibody-binding prediction. Roadmap: failure mode detection to property measurement to reasoning, steering, and principle extraction.
Deep investment in mechanistic interpretability (attribution patching, circuit discovery, concept interventions). Bio, robotics, and formal reasoning as pilot verticals. Likely $3-5M seed in mid-2026.
Real-time hallucination detection for text-based large language models using latent-space verification.
It catches your AI making things up before those made-up things reach anyone who might believe them.
It's like having a fact-checker sitting inside the brain of your AI, catching lies before they even reach the mouth.
Real-time performance degradation detection for vision-language robotic agents operating in dynamic environments.
It watches your robot's AI brain for signs of confusion before the robot does something dangerous or stupid.
It's like a co-pilot who notices the autopilot is getting drowsy and grabs the wheel before the plane nosedives.
Interpretable antibody-binding affinity prediction using latent-space property specification on protein foundation models.
It helps scientists understand why an AI thinks a drug molecule will stick to its target, not just that it will.
It's like an X-ray for your AI's thought process — instead of just hearing "this antibody works," you see exactly which molecular handshake convinced it.
Operates at the intersection of mechanistic interpretability research and developer tooling, turning cutting-edge latent-space techniques into a practical SDK. Most competitors approach from either research or product side, not both simultaneously.