What happened
OpenAI executive Thibault Sotiaux announced on August 12 that Codex's active users exceeded 15 million, triggering a reset of usage limits as previously promised. He called on users to try Fast mode, which consumes usage quota more heavily.
Why it matters
Codex had reached 10 million active users by July 21 (after GPU-5.6 launched on July 9), and the rapid growth to 15 million shows sustained momentum in AI-assisted code generation. Usage-limit resets serve to keep the service attractive to power users and signal confidence in the product's scale.
What to watch
Sotiaux had committed to resetting usage limits for every 1 million users gained until 10 million was reached; the 15 million milestone came as a surprise he had hinted at in an earlier post.
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