Tech Apr 3, 2026 21 min Google's Gemma 4 launches in four sizes (E2B–A4B), publishing Gemini 3–derived reasoning under Apache 2.0 Google DeepMind has released Gemma 4: four models—31B dense, 26B MoE (A4B), E4B, and E2B—with a 256K context, multimodal input, tool calling, and support for 140 languages. AI LLM Google Open model MoE Multimodal Local LLM