According to Ethan Mollick on X, early access to GPT-5.4 Pro delivered a working 3D p5.js scene inspired by Piranesi in a single prompt plus one refinement, with no errors, outperforming prior GPT-4 attempts that required multiple revisions (source: Ethan Mollick, Mar 5, 2026, x.com/emollick/status/2029623875303018817). As reported by Mollick’s earlier comparison, Claude 3 and GPT-4 needed iterative guidance to reach similar results, with Claude adding tide animations (source: Ethan Mollick, Apr 29, 2024, x.com/emollick/status/1784454933632160041). For AI product teams, this suggests improved code generation reliability, reduced prompt engineering overhead, and faster prototyping cycles for interactive graphics, web apps, and creative tooling. According to Mollick, the qualitative jump in single-shot correctness indicates stronger agentic planning and tool-use potential, creating opportunities for SaaS code assistants, education platforms, and design pipelines to monetize higher first-pass success rates and lower debugging costs.