A surgical robot from Shanghai MicroPort MedBot has successfully conducted a complex biliary operation on a 30kg pig without human hands, autonomously completing 88 per cent of surgical steps on its first attempt. Powered by the proprietary Neuron AI model trained on 3 billion parameters, the “Toumai” robot represents a significant leap from remote-controlled systems to AI-driven autonomous surgery.
In a quiet lab on December 24, a milestone in medical robotics was reached: a machine performed surgery on its own. The robot, developed by Chinese firm Shanghai MicroPort MedBot, carried out a delicate biliary procedure on a pig, navigating the complexities of clamping and cutting a bile duct with precision driven not by a surgeon’s joystick, but by artificial intelligence. This experiment, described as a world-first, moves the field decisively beyond tele-operation into the realm of genuine surgical autonomy.
The “brain” behind the feat is MedBot’s Neuron multimodal surgical model, an AI trained on a vast dataset of 23,000 surgical video clips. This training allows the system to simulate the decision-making process of experienced surgeons, interpreting real-time imagery and instrument data to optimize its actions. “This milestone shows how large-model artificial intelligence can serve as a powerful tool to support surgeons, improving precision and consistency under expert clinical supervision,” said Brian Chang, chief medical officer at MedBot, according to the company’s announcement.
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The robot’s performance was notably adept. It successfully initiated 88 per cent of the procedure’s steps autonomously before making real-time adjustments to complete the operation. Crucially, the company emphasized that human surgeons maintained “full supervision” and were ready to take over at any moment. This experiment is a proof-of-concept, not a precursor to immediate use on humans. MedBot clearly stated the system “has not received regulatory approval for autonomous human surgery in any country” and that the demonstration should not be extrapolated to human practice.
This breakthrough is part of a broader push by the tech industry to integrate AI deeply into medicine. From Intuitive Surgical’s established Da Vinci system to Chinese giants like Alibaba—which has developed AI for early cancer detection—and Tencent’s Aimis imaging platform, the race is on to augment healthcare with intelligent machines. The MedBot experiment, reported by the South China Morning Post (SCMP), charts a particularly ambitious course toward a future where AI could handle defined surgical tasks, potentially increasing access to high-precision operations and reducing surgeon fatigue.
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While the path to the operating room on humans remains long, fraught with regulatory hurdles and the need for exhaustive clinical trials, the successful pig surgery marks a pivotal turn. It demonstrates that AI can begin to translate observational learning into coordinated physical action in one of the most demanding environments imaginable: the living body.
