OpenAI's Thibault "Tibo" Sottiaux said on October 7 that Codex and ChatGPT Work together have reached 40 million active users, a milestone he shared as GPT-6 began rolling out in ChatGPT's main Chat tab. The announcement groups the coding agent and the workplace agent into a single adoption story as OpenAI broadens ChatGPT toward agent-led work. Sottiaux also said the company would add a banked usage reset to paid accounts.

The 40 million figure is company-reported and combines two products without a stated measurement window, so it signals reach rather than repeat use or either product's individual growth. For context, OpenAI said in June that Codex had passed 5 million weekly users, and in late August Sottiaux put ChatGPT Work at 20 million users.

The timing ties the usage claim to a wider product push: the October 7 GPT-6 release with Intelligent UI expanded the consumer surface on the same day Sottiaux promoted the combined agent audience.