OpenAI announced it will upgrade all grants under Codex for OSS to the Pro 200 tier, increase the number of grants in this round from 5,000 to 10,000, and encourage previous recipients to reapply.
OpenAI has built a new sandbox mode for Codex on Windows based on Microsoft's Execution Containers (MXC), offering faster setup, stronger network enforcement, and granular file access controls, requiring a compatible Windows 11 device.
At the 2026 Developer Day, OpenAI and ModRetro announced that the AI agent tool Codex is coming to the Chromatic retro handheld with a dedicated plugin, Game Studio. Users can describe game needs in natural language, Codex assists in generating programs, and the plugin's built-in emulator supports PC testing and streaming to the real device, with games writable to dedicated cartridges.
Unity announced the official Unity plugin for OpenAI's Codex, a first-party integration now available directly in OpenAI's universal plugin directory. The plugin is written and maintained by Unity engineers, providing developers with direct engine expertise.
Charlie Marsh announced the renewal of OpenAI's Codex for OSS program, offering maintainers $100 Pro plans and doubling the number of grants from 5,000 to 10,000 to reach more maintainers.