User compares GPT-5.4, GPT-5.5, GPT-5.6, Sol, Terra, Luna on creative brief

A Reddit user tested six OpenAI models (GPT-5.4, GPT-5.5, GPT-5.6, Sol, Terra, Luna) with a 35-word Coca-Cola Zero brief, setting reasoning to maximum. The results show varying creative outputs, with Terra and Luna producing the most visually striking pages.