OpenAI’s Codex has quietly crossed a milestone that puts the “AI agents” narrative firmly into the present tense. The platform now counts more than 3 million weekly active users, a figure that grew more than fivefold since January 2026.
From autocomplete to autonomous worker
An April 16, 2026 update introduced multi-agent parallel execution, computer control capabilities, and the ability to delegate tasks across the entire software development lifecycle. Codex can now run multiple AI agents simultaneously, each handling different parts of a project, clicking through interfaces, and handing work off to one another.
Tasks in its sandbox environments typically complete within minutes, with more complex jobs wrapping up in about 30 minutes. The platform supports both cloud-based and local execution through CLI and IDE integrations.
On June 2, 2026, OpenAI released a report highlighting Codex’s expansion beyond software engineering into automating routine knowledge work across various professions.
