Zefit is a breakthrough oncology decision-support platform that delivers personalized cancer treatment guidance in under seven days. By using a patient’s own biopsy tissue to create living "avatars" in zebrafish larvae, the system rapidly screens dozens of cancer drugs or combinations to to identify the most effective treatment. Designed for oncologists treating aggressive or treatment-resistant cancers, Zefit accelerates precision medicine where time matters most empowering oncologists with fast, personalized drug-response data, especially for aggressive or treatment-resistant cases. Unlike traditional models that take months, Zefit’s automated system uses 95% fewer reagents and achieves a 94% match with clinical outcomes. Patients guided by Zefit have seen up to 4× longer progression-free survival. By compressing months of testing into days, Zefit makes precision oncology faster, more accessible, and more sustainable.