ShanghaiStep 5 draws 18.8 trillion weekly OpenRouter tokens, ranking second.

Artificial Analysis puts its cost per task at $0.71, against $5.86 for Claude Opus 5.

It activates 27 billion of 600 billion parameters and stacks 92 layers, with sparse attention trimming 1-million-token context costs.

By StepFun’s own tests, it beats Kimi K3 and GLM-5.3 but trails GPT-6 Astra and Claude Opus 5.

OpenRouter’s next weekly ranking will show whether Step 5 holds second place.

How each outlet framed it
Zhidx leans favorable
cites Step 5's 92-layer narrow-deep design and claims per-task cost is 1/8 of Claude Opus 5

Sources: Zhidx