Hugging Face Blog·· 2026-08-25SelectedAI score61
Granite 4.2 LLMs: How They're Built
Granite 4.2 LLMs: How They're Built
AI introduction
IBM released the Granite 4.2 reasoning model family, comprising 3B, 8B and 30B dense decoder models built on the Granite 4.1 base (pretrained from scratch on about 15T tokens, with a five-stage strategy extending context to 512K), post-trained with SFT and multi-stage GRPO reinforcement learning, all open-sourced under the Apache 2.0 license.
Why it matters
The official disclosure covers the full training pipeline from pretraining and SFT to multi-stage GRPO and agentic RL, transferable to similar model-building workflows.
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Source: Hugging Face Blog · huggingface.co