Meta Curbs External AI Coding Tools, Shifts Staff to In-House MetaCode

Meta has told its internal engineers to limit use of external AI coding assistants such as Anthropic's Claude and OpenAI-linked Codex, and to move to its own tool, MetaCode. Communicated through an internal memo, the shift comes as the company expects to spend billions of dollars on internal AI use in 2026 alone, with the move aimed at curbing costs and protecting intellectual property. New controls and tools are slated to reach employees within weeks. (related coverage, Yahoo Finance)