ai/granite4.1-guardian repository overview

⁠Granite Guardian 4.1 8B (GGUF)

⁠Model Summary

Granite Guardian 4.1 8B is a specialized safety model fine-tuned from ibm-granite/granite-4.1-8b⁠, designed to judge if the input prompts and the output responses of an LLM-based system meet specified criteria. The model comes pre-baked with certain criteria including but not limited to: jailbreak attempts, profanity, and hallucinations related to tool calls and retrieval augmented generation in agent-based systems. Additionally, the model also allows users to bring their own criteria and tailor the judging behavior to specific use cases.

This version of Granite Guardian is a hybrid thinking model that allows the user to operate in thinking or non-thinking mode. In thinking mode, the model produces detailed reasoning traces through <think> ... </think> and <score> ... </score> tags. In non-thinking mode, the model only produces the judgement score through the <score> ... </score> tags.

It is trained on unique data comprising human annotations and synthetic data informed by internal red-teaming. It outperforms other open-source models in the same space on standard benchmarks.

• Developers: IBM Research
• GitHub Repository: ibm-granite/granite-guardian⁠
• Cookbook: Granite Guardian Recipes⁠
• Website: Granite Guardian Docs⁠
• Paper: Granite Guardian⁠
• Release Date: April, 2026
• License: Apache 2.0⁠