IBM Granite 4.2 Open-Sources Three Reasoning Models: Real-Sandbox Reinforcement Learning Training, 30B Achieves 57% on SWE-Bench
IBM released the Granite 4.2 series on August 25, 2026, comprising three open-weight reasoning models (3B, 8B, and 30B) under the Apache 2.0 license, trained via agentic reinforcement learning in real sandbox environments, with the 30B model scoring 57% on SWE-Bench Verified.