OpenAI's official GPT-6 Astra prompting guide: five changes to stop prompting it like GPT-5

goyalshaliniuk · x · 2026-09-09

OpenAI released an official prompting guide for GPT-6 Astra, noting most people still prompt it like GPT-5. Key points: audit your AGENTS.md for conflicting stale instructions; define autonomy explicitly; keep skill descriptions to one line; stop micromanaging tests (repetition causes overtesting); define clear stop conditions. Core takeaway: give Astra ownership instead of controlling every step.

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