GPT-5.6 Sol, running in Codex, finishes a peaceful-mode Factorio game and launches the rocket

Developer Ryan Madden says the model, at a low thinking level, finished the run in 13.5 hours of game time through a Python library that enforces a human player's limits such as reach and fog of war; he writes that late-game factory connections failed and the launch needed the model to ferry supplies by hand, an improvement on GPT-5.5, which did not use transport belts at all.