Upstage AI Releases: Solar Open 100B

Upstage Jan 8, 2026

Solar Open 100B

Upstage Solar Open 100B: 102B MoE trained on 19.7T tokens

Upstage released Solar Open 100B, a 102B parameter MoE model with only 12B active parameters per token (129 experts, top-8 activation), trained on 19.7 trillion tokens including 4.5T synthetic via a 'data factory' approach. It outperforms GLM 4.5 Air on many benchmarks, features the SNAP PO reinforcement learning technique with a 50% training speedup, and delivers best-in-class Korean language performance.