An AI Agent Injected Drugs into a Live Mouse's Brain

Exin Therapeutics CEO Gabriel Ocana Santero connected an AI agent to a custom rig with a robotic arm, camera and injector, and the agent selected a gene therapy from 19 options and carried out a brain injection on a live mouse with epilepsy. Anthropic's Claude Opus 5.5 refused to guide the needle into the brain, so the team switched to Claude Sonnet 5, and a coordinate-system glitch was fixed by a separate agent on Opus 5, extending the roughly 45-minute procedure to just over an hour. The team is waiting for the therapy to take effect before assessing its impact on seizures, and the mouse is reported to be recovering well.