Gemma 3 vs Gemma 4 — which of Google's open models should you actually run, especially in an AI agent like Hermes? Gemma 4 is the newer generation, and for most people it's the clear upgrade: laptop-ready, faster, and built for agentic reasoning. Here's how Gemma 3 and Gemma 4 compare and which to pick.
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Gemma 3 vs Gemma 4: The Quick Verdict
Gemma 4 wins for almost everyone. It's the newer release, runs on modest hardware (the 12B version fits in around 16GB of VRAM), and is designed for agentic reasoning — so it plugs into Hermes and runs free, local and offline. Gemma 3 is still a capable open model, but Gemma 4 supersedes it on speed, quality and agent-readiness. Unless you already have Gemma 3 set up and working, start with Gemma 4.
What Is Gemma 4?
Gemma 4 is Google's newest open-source model. The 12B version is laptop-ready, open, and near the quality of models twice its size, with a focus on agentic reasoning. It's fast, free to run locally, and pairs well with Hermes as a free brain. See best local model for Hermes agent.
📺 Watch: Build Your Own AI Assistant With Gemma 4 12B + Hermes Agent
What Is Gemma 3?
Gemma 3 is the previous generation of Google's open Gemma family — a solid, lightweight open model that ran well locally in its day. It's still usable, but it predates Gemma 4's agentic focus and efficiency gains, so newer builds generally reach for Gemma 4 instead.
Gemma 3 vs Gemma 4 Head-To-Head
| Gemma 4 | Gemma 3 | |
|---|---|---|
| Generation | Newest | Previous |
| Local hardware | 12B laptop-ready (~16GB VRAM) | Lightweight too |
| Agentic reasoning | Built for it | Less so |
| Best for | New local/agent builds | Existing setups |
| Cost | Free & open-source | Free & open-source |
📺 Watch: Gemma 4 + Hermes is INSANE (Free + Local!)
Which Is Better For Hermes Agent?
Gemma 4. Because it's built for agentic reasoning and runs free and local, it's the better brain for Hermes — fast enough for a sub-agent and capable enough for everyday tasks. See how to use Hermes for free.
How To Run Gemma 4 In Hermes
- Install Ollama and download Gemma 4.
- Point Hermes at it (launch command, or the models page in the Hermes web UI).
- Start prompting — free, local, offline.
Frequently Asked Questions
Is Gemma 4 better than Gemma 3?
Yes for most uses — Gemma 4 is the newer generation, laptop-ready, faster and built for agentic reasoning, making it the better pick for running in Hermes. Gemma 3 still works but has been superseded.
Can I run Gemma 4 for free?
Yes — Gemma 4 is open-source and runs free locally via Ollama, or via a free API if your hardware is limited.
Which Gemma should I use with Hermes?
Gemma 4 — it's designed for agentic reasoning and is the current, laptop-ready open model, so it's the better free brain for Hermes.
The Bottom Line
Gemma 3 vs Gemma 4 is a short debate: Gemma 4 is the newer, faster, agent-ready open model and the one to run in Hermes for free, local, offline automation. Use Gemma 4 unless you already have Gemma 3 working — and get the whole free Hermes setup inside the AI Profit Boardroom.
