# Hugging Face releases Granite 4.1 previews with LLMON language

- Published: 2026-11-12T19:07:35.000Z
- Updated: 2026-11-12T22:06:39.485Z
- Section: Models
- Topics: Security
- Page: https://aidailyjournal.com/en/n/2026/11/12/hugging-face-releases-granite-4-1-previews-with-llmon-language/
- Sources: [Hugging Face](https://huggingface.co/blog/ibm-granite/llmon-an-llm-native-markup-language-now-in-granite)

## Summary

Hugging Face has released the experimental preview models granite-4.1-3b-LLMON-preview and granite-4.1-8b-LLMON-preview, derived from Granite 4.1 base models. The company also published a GitHub repository with tools, examples, JSON-to-LLMON converters and support for use with Mellea.

LLMON uses special-token delimiters and tags to represent instructions, data, requirements and nested structures explicitly for language models. Hugging Face says this brought indirect prompt-injection success rates down to nearly zero on some benchmarks, while instruction-tuned models were hijacked with high probability. The company says general capability was maintained relative to Granite 4.1 Instruct models and explains that LLMON complements, rather than replaces, chat templates.

## Why it matters (editorial interpretation)

If the results cited by Hugging Face hold beyond the mentioned benchmarks, explicitly representing instructions and data could offer an additional approach to reducing prompt-injection hijacking. The published repository also lets developers test the proposal and its integration with Mellea.

_Summary written by AI Daily Journal in its own words, based on the sources above. For details, read the original articles._