Engineers still sign off on the work, but the balance of power has clearly shifted.

The tech giant says the change has happened at breakneck speed.

In late 2024, only a quarter of its code came from AI tools. By last autumn, that figure had doubled.

Now, Google says AI has effectively become its main coder, with humans acting as reviewers and troubleshooters.

Boss Sundar Pichai said the company is moving into “truly agentic workflows,” where engineers oversee autonomous AI agents capable of running long, complex tasks without constant human input.

One recent project — a major code migration — was reportedly finished six times faster using these AI agents than a similar job completed by engineers alone a year earlier.

Google’s internal teams are now heavily reliant on its Gemini models, which generate new code, clean up old systems and speed through tasks that once took days.

Some staff have even been given AI‑usage targets that will count toward their performance reviews, underlining just how much the company is pushing the shift.