Granite 4.2 3B

The smallest member of IBM's Granite 4.2 open reasoning family, released Aug 25 2026 under Apache-2.0 (ibm-granite/granite-4.2-3b; reports ~4B parameters on Hugging Face) and aimed at local / edge deployment. A dense, decoder-only transformer with the family's thinking / non-thinking switch and low-effort thinking mode, pre-trained from scratch on ~15T tokens with a five-phase curriculum (context extended to a claimed 512K; shipped configuration 131,072 tokens), then SFT on reasoning data and multi-stage RL. Supports native tool calling. Open weights on Hugging Face, Ollama, and GitHub; no hosted list price at launch.