The Allen Institute for AI released Olmo-core 3 on October 1, 2026, an upgrade to its large language model development framework built around a redesigned open mixture-of-experts training system that Ai2 said it has benchmarked at more than one trillion total parameters. Ai2 said Olmo-core 3 is designed to scale MoE training into the trillion-parameter range while preserving computational efficiency, and described it as one of the core systems behind the next generation of Olmo. The release is…