IBM Granite (ibm-granite) · Structured Prompt Format

LLMON: LLM-Native Markup Language (Granite 4.1 LLMON previews)

IBM Granite introduces LLMON, an XML-like markup language with reserved special tokens for structuring LLM context, and releases two experimental preview models, granite-4.1-3b-LLMON-preview and granite-4.1-8b-LLMON-preview, derived from Granite 4.1 base models. The models separate instructions from data so that indirect prompt injections are largely ignored, with attack success rates reported as dropping to nearly zero on some benchmarks while general capability stays close to Granite 4.1 Instruct. A GitHub repo provides a toolkit, JSON-to-LLMON converters, and examples, and the Mellea framework has native LLMON support. The page does not state a licence.