7.8
GPT-5.6 Sol Review 2026 — OpenAI's Vision Jump Measured on Detection, Counting, and OCR
Roboflow benchmarked GPT-5.6 Sol, Terra, and Luna on object detection, counting, OCR, and text extraction ahead of its own VLM benchmark. Sol jumped detection from GPT-5.5's 13.8 to 46.2 mAP@50, counting from 64.9% to 73.0%, and OCR stayed flat at 90.7%. But Sol costs ~2.5 cents per image and averages ~10 seconds per image, while Gemini 3.5 Flash still leads detection at 0.8 cents. We break down the numbers, the coordinate-format gotcha, the 2,000px instability OpenAI confirmed, and the HN reaction (287 points, 149 comments).