OpenAI Codex Hits 4 Million Weekly Active Developers — Added 1M in Two Weeks

Neowin / paddo.dev·high signal

OpenAI announced Codex reached 4 million weekly active developers as of April 21, up from 3 million just two weeks prior. paddo.dev analysis argues this growth represents a quality-vs-scale tradeoff: Anthropic touts revenue while OpenAI highlights adoption, and each company emphasizes the metric they can defend. The 1M-in-two-weeks acceleration suggests developer tool adoption follows power-law dynamics once a critical mass is reached.