How Codex Happened: inside OpenAI's comeback in AI coding, from failed launch to takeover

danshipper · x · 2026-10-17

Dan Shipper's long-form piece recounts OpenAI's coding comeback: muted early reactions to GPT-5's coding ability convinced him OpenAI was losing its lead; the cloud-only Codex lacked product-market fit before pivoting to a local terminal agent. Codex is now the centerpiece of OpenAI's strategy, 'swallowing ChatGPT from the inside.'

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