GPT-6 Astra autonomously completed the entire video game Portal, from start to finish, in roughly 23 hours and 43 minutes. After receiving an initial objective, it proceeded without further human intervention until the credits rolled. Developer cozyblaze configured the model to control Portal through MCP and a modified SourcePauseTool that freezes gameplay while Astra reasons. During each pause, the system processes screenshots, player coordinates, and camera data before selecting inputs. Token usage for the run would cost about $570 at list prices, though a cheaper subscription was used. Cozyblaze framed the accomplishment as an incremental step toward OpenAI’s long-standing goal of versatile, game-playing agents.
This update represents a notable development in the Ai sector. Organizations and founders tracking this space should evaluate potential strategic and technical implications on their operations.