Google opens Claude Opus 5 to all its engineers, within its own development environment

Until now reserved for a few DeepMind teams, Anthropic's model is now accessible to all in-house developers — but only since Antigravity, and under individual quota.

Google lifted an internal rule that forced its developers to stick to Gemini and blocked the use of Claude Code as well as Codex. All engineers can now select Claude Opus 5 from Antigravity, the in-house development platform, with a quota assigned per user.

The nuance counts: it is not a question of authorizing Anthropic's tools, but of exposing its model inside an environment controlled by Google, including billing. Until now, access to Claude has been limited to certain DeepMind teams and projects deemed to be priorities, while several engineers have long expressed their dissatisfaction with Gemini's performance on programming tasks.

A company spokesperson carefully frames the scope of the gesture: "Gemini remains our main and fundamental model for internal development", with third-party models being provided under quota to cover specialized uses. Antigravity, an agent-oriented development environment resulting from the acquisition of the Windsurf team, thus finds itself arbitrating between competing models in the selection offered to employees.