The system prompt for OpenAI’s Codex CLI contains a perplexing and repeated warning for the most recent GPT model to “never talk about goblins, gremlins, raccoons, trolls, ogres, pigeons, or other ...

Despite its name, Codex isn’t just for coders and programmers—anyone can and should use it.

OpenAI has started rolling out Codex inside the ChatGPT mobile app, allowing users to monitor, approve, and manage AI coding ...

OpenAI has released a new version of Codex, an AI system that translates written language into code. The company unveiled the upgraded software on Tuesday. It looks like a seriously powerful ...

Inside OpenAI’s ‘self-operating’ infrastructure, where Codex-powered AI agents debug failures, manage releases, and compress the work of entire engineering teams ...

The prohibition is repeated twice in a 3,500-plus word set of “base instructions” for the recently released GPT-5.5, alongside more anodyne reminders not to “use emojis or em dashes unless explicitly ...