Claude Fable 5.2 designs three electronic prototypes from one prompt: Diode built them straight from its design files, with no circuitry fixes
Working again with Diode Computers, Claude Fable 5.2 designed three devices—a speakerphone, a voice-assistant hub and a handheld virtual pet—from short prompts, handling board layout, routing, enclosure modeling and firmware itself. Earlier models could not reliably lay out a circuit board and produced boards that were 95% complete yet unusable; on Diode's internal PCB Gym benchmark, Fable 5.2 scored 69% against 25% for Fable 5. All three boards were manufactured directly from the design files without adjustments, but they remain prototypes that have not been through electrical validation, antenna tuning, thermal testing or certification.