IBM Releases Granite Models Designed to Resist Prompt Injection

IBM’s Granite team released two experimental language models on November 12, 2026, trained to separate trusted instructions from untrusted data. IBM reports that the 3B and 8B previews avoided 47% more attacks than the best frontier model it tested on the OPI benchmark. The two models, Granite-4.1-3B-LLMON-preview and Granite-4.1-8B-LLMON-preview, were fine-tuned from Granite 4.1 base checkpoints rather than the released instruct models. Both carry an Apache 2.0 license and are intended for...