“A Staff Engineer Collaborator” | Notion’s First Look at GPT-6 Astra

Don’t sleep on Astra. Quinn Johnson started working with GPT-6 Astra differently in Codex: he shared the goal, added context, and let it tackle the problem his team had been working on. On a cache-reuse audit, Astra connected patterns the Notion team had overlooked, then explained the issue clearly. The Notion issue was sneaky: older messages were being regenerated using what the agent knew, subtly changing the prompt history and breaking cache reuse. Everything could still appear to work while becoming quietly slower and more expensive at scale. 🚀 Astra finding that hidden pattern made it a meaningful engineering win.