Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Rank
#193
Up 3% week over week
Tokens
2.7B
2026-08-14
Requests
316.5K
316,541
Tool calls
-
Input / M
$0.10
Output / M
$0.30
Cache / M
Free
Context
262K
262,144 tokens