Upstage Unveils Solar Open2, Targeting Enterprise AI with 250B Model

Upstage has released Solar Open2, a 250B-parameter open-weight LLM designed for enterprise AI agents, featuring a custom simulation environment (Officeverse) for task training and a mixture-of-experts architecture that activates only 15B parameters during inference. The model handles 1M-token contexts and outperforms comparable models on code generation benchmarks.

This Wire brief sits within Fusion42's coverage of AI Frontier Models and AI Agents, and 3 sources have reported it between 22 Jul 2026 and 23 Jul 2026.