Inside OpenAI's Codex Comeback: From Failed Launch to the App That Swallowed ChatGPT
every · x · 2026-10-16
Dan Shipper of Every publishes a long-form oral-style history of OpenAI's coding turnaround. In summer 2025, Every's 10-person team spent a week stress-testing GPT-5 before launch and found it underwhelming for coding in Codex, prompting Shipper to think OpenAI was losing its lead. The original cloud Codex had missed product-market fit, and the team was mid-pivot to a terminal-based local version. Today Codex is the centerpiece of OpenAI's comeback — it has "swallowed ChatGPT from the inside" and become the foundation for everything the company builds next. Free to read.
Related event: Every's Deep Dive: How Codex Went from Side Project to 40M Weekly Users(22 posts)→
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