Gemma 4 Architecture: MoE, Encoders and Per-Layer Embeddings

Melvin Vivas · X post · 2026-04-04 · Open on X

Topics: LLM Fundamentals · Level: intermediate

Summary

The creator shares a quoted post about 'A Visual Guide to Gemma 4', which explains the architecture of Google's new open models. The guide covers Mixture of Experts, the vision encoder, per-layer embeddings and the audio encoder.

Key points

• Gemma 4 is Google DeepMind's new family of open models.
• Some variants use a Mixture of Experts architecture.
• It handles images through a vision encoder and audio through an audio encoder.
• Small variants use Per-Layer Embeddings.

Resources mentioned

• A Visual Guide to Gemma 4 · article · newsletter.maartengrootendorst.com · free
  Illustrated walkthrough of the Gemma 4 architecture: MoE, vision encoder, per-layer embeddings and audio encoder.
  Also in: A Visual Guide to Gemma 4 Architecture (Maarten Grootendorst) (Melvin Vivas on X · notes)

Try this

• Read the Visual Guide to Gemma 4 to learn the new architecture.