GPT-6 Astra beat Portal solo in ~24 hours

Developer cozyblaze published code and docs on GitHub showing GPT-6 Astra completed the game Portal on its own in about 24 hours after an initial goal was set, with no further human help. The developer commented that Astra may be "the worst model we'll ever get."

• GPT-6 Astra outlasts other agents in Minecraft test2026-09-16
• GPT-5.6 Luna vs GPT-6 Astra for Code Review2026-09-14
• Generating running routes with GPT‑6 Astra2026-09-13
• OpenAI Launches Finance ChatGPT and Agents API2026-09-12
• Perplexity deploys GPT-6 Astra in production2026-09-12