SuanNi

Mar 6, 2026 · Artificial Intelligence

How Step 3.5 Flash Bridges the Gap to Top LLMs with Sparse Expert Architecture

Step 3.5 Flash, a 196‑billion‑parameter sparse‑mixture‑of‑experts LLM, combines sliding‑window and full attention, multi‑token prediction, and a custom Steptron training framework to achieve performance on par with leading models while optimizing long‑context efficiency and training stability.