Claude Fable 5.2 took a speakerphone, a voice-assistant hub and a handheld virtual pet from short prompts to working prototypes.

From short prompts, it produced specs, schematics, board layouts, 3D-printable cases and firmware for a speakerphone, voice-assistant hub and handheld virtual pet.

Diode Computers, a board maker, built all 3 straight from the model’s files, skipping the usual rounds of manufacturing changes.

Over the past year, earlier models left Diode with layouts 95% complete yet unusable, because they rarely undid placements that blocked the wiring.

Fable 5.2 reworked its designs unprompted, rerouting the hub’s tracks dozens of times and reassigning chip pins so the speakerphone’s touch-control tracks never crossed.

On Diode’s internal PCB Gym layout benchmark, it scored 69% against 25% for Fable 5 at about 1/3 of the API cost.