GPT-6 draws a floor plan, Opus 5.5 converts it to AutoCAD
GPT-6 Astra generated an 8x15 m ground floor plan, then Claude Opus 5.5 worked out the scale from the plan's own dimensions before drawing it and exporting a DXF file that opens in AutoCAD.
GPT-6 ASTRA GENERATED THE FLOOR PLAN. CLAUDE OPUS 5.5 TURNED THE PICTURE INTO AUTOCAD. Someone described a house to GPT-6 Astra: a garden, two bedrooms with a closet, a bathroom, a dining room, a kitchen, a living room, a patio and a garage for two cars. Then asked it to generate the ground floor plan in detail from that description. The input was a picture of that floor plan, 8 by 15 m. Claude Opus 5.5 worked out the scale from the plan's own dimensions first: 2.5 + 2.0 + 2.0 + 3.0 + 5.35 = 14.85 m between gridlines, plus the 0.15 m wall makes 15.00. Short side: 7.85 + 0.15 = 8.00. Both sides add up. Only then did it start drawing and hand back a DXF that opens in AutoCAD.