# IBM releases LLMON preview models for Granite 4.1

> Two experimental Granite 4.1 models (3B and 8B) now understand LLMON, a markup language that isolates instructions from data.

Oossa · 2026-11-12 · https://oossa.com/en/ibm-releases-llmon-preview-models-for-granite-4-1

IBM announced two preview models, granite-4.1-3b-LLMON-preview and granite-4.1-8b-LLMON-preview, built on its Granite 4.1 base. The models are trained to read and generate LLMON, a markup that tags instructions, data and requirements with special tokens. IBM says the new format cuts indirect prompt‑injection success rates to near zero while keeping overall capability comparable to standard Granite 4.1 Instruct models. The code, a GitHub repo and conversion tools are also released for developers to try.

## The facts

- Release date: "Thu Nov 12 2026"
- Model sizes: 3 billion and 8 billion parameters

## Why it matters

Developers can test a safer way to separate commands from user data, reducing the risk of hidden prompt attacks in their applications.

## Sources & references

1. [LLMON: An LLM-Native Markup Language, now in Granite 4.1 3B and 8B](https://huggingface.co/blog/ibm-granite/llmon-an-llm-native-markup-language-now-in-granite) – Hugging Face, 2026-11-12

Last updated: 2026-11-12