IBM Releases Granite 4.1: Open-Source Enterprise LLM with 512K Context Under Apache 2.0

Summary

IBM released Granite 4.1 as a family of three open-source dense decoder-only models (3B, 8B, and 30B parameters) under the Apache 2.0 license, trained on approximately 15 trillion tokens across five pre-training phases. The 8B instruct model matches or outperforms the previous Granite 4.0-H-Small (a 32B MoE with 9B active parameters), achieving 87.2% on HumanEval, 92.5% on GSM8K, and 68.3% on BFCL v3 tool-calling benchmarks. Context window extends to 512K tokens with staged long-context training