Vals AI, a completely independent evaluator, tested OpenAI’s GPT-6 Astra by throwing it into Minecraft and allowing it to its own tools for 141 hours with only ordinary computer controls: screen, mouse, and keyboard. No fancy game-modifying plug-ins were employed. Thousands of people tuned in to the Twitch stream to watch how it performed. Which wasn’t surprising given that the first, shorter attempt had already created a Nether portal in two and a half hours, long before the game had ever been released. Finally, Astra was the first system Vals had witnessed approach a Nether Castle.