OpenAI DevDay: Codex gets reusable cloud environments that work across devices
At OpenAI's DevDay on 29 September 2026, Codex gained reusable cloud development environments that follow the developer across devices; the company also announced security scans, a Decisions API and an Ultrafast mode. According to Engadget, the Codex app runs entirely in the cloud, and Baseten is bringing open models to Codex.
Who is affected and how
- senior developer
- Try the cloud Codex environment for long tasks that run without a laptop, and measure the time saved on repeated setup.
- tech lead
- Examine the built-in security scans as a complement to your existing code-review process.
- CTO
- Weigh the data-handling and cost implications of cloud execution before rolling it out team-wide.
Sources
- OpenAI’s Codex gets reusable cloud environments that follow developers across devicessiliconangle · Sep 29, 2026
- OpenAI gives Codex reusable cloud environments that work across devicestechcrunch · Sep 29, 2026
- OpenAI gives Codex reusable cloud environments that work across devices | TechCrunchtechcrunch.com · Sep 29, 2026
- OpenAI's Codex gets reusable cloud environments that follow developers across devices - SiliconANGLEsiliconangle.com · Sep 29, 2026
- OpenAI’s Codex gets reusable cloud environments that follow developers across devices · DevFeeddevfeed.tech · Sep 29, 2026
- OpenAI brings reusable cloud environments to Codex | SiliconReportsiliconreport.com · Sep 29, 2026
- OpenAI Codex Cloud Environments Move Coding Work Beyond the Laptopremio · Sep 30, 2026
- What Is Codex? OpenAI Codex, the Coding Agent | Farasat Alifarasat.me · Sep 30, 2026
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