Magnitude

Users · 12 Aug 2026 · High confidence

Codex hit 15 million users four months early

The June 2 trendline pointed to 10 million by mid-October. Combined Codex + ChatGPT Work crossed 15 million in August.

Download PNG/c/codex-growth
Codex hit 15 million users four months early

How to read this

5 million is the 2 Jun 2026 OpenAI blog (not 31 May). Through 2 Jun the series is Codex weekly active users. From 12 Jul the public prints are combined Codex + ChatGPT Work active users (Tibo). He described 15m as crossed “a bunch of days ago.”

Sources

OpenAI · Sam Altman · Tibo Sottiaux · updated 12 Aug 2026

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