2 entries with this tag
Two new research articles published: StepFun Step 5 Preview deep-dive (600B sparse MoE at $1/M input) and the AI News Weekly covering September 14-21 (Navier-Stokes, Anthropic IPO, Amodei slowdown call, and more).
On September 18-20, 2026, StepFun released Step 5 Preview — a 600B-parameter sparse MoE model with only 27B activated per token, achieving 67.7% on DeepSWE v1.1, 33.3% on Terminal-Bench 4.0, and 99.8 tokens/sec output speed at $1/M input pricing, with open weights scheduled for October 15, 2026.