Codex from 0 to 10M Users: Building ChatGPT Work — Akshay Nathan, OpenAI
OpenAI's own account of how Codex's early user growth became the basis for ChatGPT Work.
3 items · 2 sources · 3 days
Operational story trace
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OpenAI shipped an improved GPT-5.6 Sol inside ChatGPT on Aug 6 and widened free-tier access to GPT-5.6 Luna, extending the same push toward broader, cheaper access that ChatGPT Work has been built around.
OpenAI's product lead traced ChatGPT Work's growth from Codex's 0-to-10M-user run to a full agentic assistant (Sites, Memory, Subagents, Finance, no-code) on Jul 28. An outside engineering write-up followed on Aug 4, reconstructing how Memory, Proactivity, Scheduling, Browser Use, Plugins, Skills, and Tools actually fit together inside the product.
Arc
OpenAI's own account of how Codex's early user growth became the basis for ChatGPT Work.
First outside engineering breakdown of ChatGPT Work's internals.
First concrete product update since the ChatGPT Work write-ups — an improved Sol model and wider Luna free access.
OpenAI's own account of how Codex's early user growth became the basis for ChatGPT Work.
First outside engineering breakdown of ChatGPT Work's internals.
First concrete product update since the ChatGPT Work write-ups — an improved Sol model and wider Luna free access.
What to watch — open questions
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