Google gives all of its engineers Claude Opus 5 access via Antigravity, and says "Gemini remains our primary and foundational model for internal development" (Hugh Langley/Business Insider)

Google has provided all its engineers with access to Claude Opus 5 through Antigravity, a move that grants them a tool previously unavailable to many Googlers. Despite this new access, Google has clarified that "Gemini remains our primary and foundational model for internal development." This indicates that while Claude Opus 5 is now accessible, Gemini will continue to be the core AI model for the company's internal projects and innovations.