According to @emollick, the Encounter Test—asking AI to simulate a Dungeons and Dragons creature battle and seeing how long until it fails—shows GPT-4o performing best with coherent, visualized outputs, while Gemini delivers engaging but less consistent results; Claude Code produced the visualization per the request, highlighting multimodal strengths and weaknesses across models (as reported on X by Ethan Mollick). According to Ethan Mollick, outcomes across models were similar overall, but prompt quality likely affects stability, suggesting practical opportunities for benchmarking multimodal reasoning, game simulation logic, and tool-use orchestration for enterprise use cases in simulation, interactive training, and generative agents.