GPT-6 Astra completes Portal unaided in 24 hours, developer says

An independent developer reported that OpenAI's GPT-6 Astra completed Valve's puzzle game Portal start to finish with no human help after the initial goal was set, taking about 24 hours and roughly $571 in tokens. The developer, cozyblaze, published the code and documentation on GitHub, describing the current model as "the worst model we'll ever get."

Why it matters: Portal demands sustained spatial reasoning and multi-step planning over long horizons, a different skill set than the coding and math benchmarks Astra is usually tested on, so an unaided completion is a useful independent data point on generalization. It's worth weighing against the informal setup, though, since it's one enthusiast's run rather than a controlled benchmark.