Google unveils Gemma 4, expands lightweight open model lineup for developers

Google has introduced a new generation of its open AI models under the Gemma family, with the launch of Gemma 4. Google Deepmind chief executive Demis Hassabis confirmed the development in a post on X on Thursday.

The company described Gemma 4 as its “most capable open model” to date. Google released it in four variants, each designed for different levels of performance and hardware requirements: Effective 2B (E2B), Effective 4B (E4B), 26B Mixture of Experts (MoE) and 31B Dense.