Google Starts Building Next AI Model as Current Top Model Runs Late

Google's AI team said July 21 it has started training Gemini 4, its next major AI model. Three smaller models shipped the same day. But the company's most powerful model, Gemini 3.5 Pro — last updated in February and promised for June — still has no release date. A manager said it is being tested with partners. Bloomberg reported delays tied to missed performance goals.