Granite 4.1 3B
IBM · 2026-04-29 · 3.4B parameters
Granite 4.1 3B is IBM's 3B-class long-context instruct language model, fine-tuned from Granite-4.1-3B-Base and built as a dense decoder-only Transformer with a 131,072-token sequence length. IBM says the Granite 4.1 language-model family was pretrained on approximately 15 trillion tokens and then refined through supervised fine-tuning and multistage reinforcement learning; the 3B model is designed for instruction following, chat, tool calling, code tasks, RAG, and multilingual dialogue, without an extended-reasoning mode. Its weights are released under Apache 2.0.