OpenAI moves to close the Codex gap by acquiring persistent-sandbox vendor Ona

BuildFastWithAI·medium signal

Per BuildFastWithAI's June 24 roundup, OpenAI acquired Ona to give Codex persistent cloud environments that keep agent tasks alive for hours-to-days, directly targeting the durability advantage Claude Code holds. The framing cites Claude Code at 40%+ of the AI coding market versus Codex around 21%, making long-running sandboxed execution the competitive battleground. Single-source secondary report, worth confirming against a primary announcement, but consistent with the broader push toward stateful, long-horizon coding agents.