IBM releases Granite 4.1 preview models based on the LLMON markup language
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On November 13, 2026, IBM released two experimental preview models based on Granite 4.1 via a Hugging Face blog post (first-hand source): granite-4.1-3b-LLMON-preview and granite-4.1-8b-LLMON-preview. The two models were specially trained to consume and generate LLMON (LLM Object Notation), a markup language that explicitly marks the structure and binding relationships of instructions, data, and constraints by preserving special tokens as tags. The models are currently available on Hugging Face as experimental previews, with no further reports on the official release timeline or follow-up plans.
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- Hugging Face BlogSelectedLLMON: An LLM-Native Markup Language, now in Granite 4.1 3B and 8B
IBM has released two experimental preview models based on Granite 4.1, granite-4.1-3b-LLMON-preview and granite-4.1-8b-LLMON-preview, trained to consume and generate LLMON (LLM Object Notation), a markup language that uses special reserved tokens as tags to explicitly mark the structure and binding of instructions, data, and constraints.
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