According to Ethan Mollick (@emollick), GPT-5.5 Pro demonstrated strong performance on complex tasks, including autonomously conducting social science research and designing a novel RPG, though some jagged behavior remains. As reported by Ethan Mollick’s Substack post “Sign of the Future: GPT-5.5,” the model showed improved reasoning and initiative-taking in multi-step research workflows and creative design tasks, positioning it as a leading option for difficult problem-solving today. According to Mollick’s account, these capabilities suggest near-term business opportunities in semi-automated research, rapid prototyping, and content development where supervised autonomy can cut cycle times and costs.