A blind test of ChatGPT, Claude, and Gemini across 20 everyday tasks found ChatGPT leading with a 40% clean win rate, Claude second at 25%, and Gemini at 15%, with 20% of prompts resulting in ties. The evaluation revealed genuine failures: Gemini prescribed unsafe exercises to a back-pain patient, Claude violated explicit recipe constraints and exceeded character limits, and Gemini missed documented meeting action items. Scoring was based on task completion, factual accuracy, clarity, usability, and format compliance.