---
title: "GPT-6 Astra completes Portal unaided in 24 hours, developer says"
url: https://www.parallelquant.com/posts/gpt-6-astra-completes-portal-unaided-in-24-hours-developer-says-497ea9
source_name: "The Decoder"
source_url: https://the-decoder.com/gpt-6-astra-beat-portal-start-to-finish-without-human-help-in-under-24-hours/
published: 2026-09-07T17:39:32.000Z
topics: ["llms", "research"]
publisher: "Parallel Quant"
---

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

*2026-09-07 · Source: [The Decoder](https://the-decoder.com/gpt-6-astra-beat-portal-start-to-finish-without-human-help-in-under-24-hours/)*

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.

**Topics:** llms, research

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Read the original: https://the-decoder.com/gpt-6-astra-beat-portal-start-to-finish-without-human-help-in-under-24-hours/
Canonical: https://www.parallelquant.com/posts/gpt-6-astra-completes-portal-unaided-in-24-hours-developer-says-497ea9
Published by Parallel Quant — https://www.parallelquant.com