StepFun language-model release named Step 3.7 Flash.
Pricing
Model profile · Current snapshot
Input / 1M
$0.20
Output / 1M
$1.15
Blended / 1M
$0.438
Output TPS
402
TTFT (s)
0.77
Model Intelligence
Arena ranking
43
Benchmarkable
Yes
Model level
release
Intelligence Index
42.6
Coding Index
37.1
GPQA
0.81
HLE
0.2
SciCode
0.4
IFBench
0.67
LCR
0.64
TerminalBench Hard
0.36
TAU2
0.99
Recent stories
2 linked stories
releasePRIMARY2026-05-30
Step 3.7 Flash opens 30-day free access for Hermes users via Nous Portal
A day after launch, Nous made Step 3.7 Flash free for 30 days to Hermes users through Nous Portal. The access window landed alongside fresh vLLM/NIM and MLX-VLM support, making the model easier to test in both local and production stacks.
newsPRIMARY2026-05-29
Step 3.7 Flash launches with day-one support in Kilo, Modal, SGLang, Hermes, and DesignArena
Step 3.7 Flash landed immediately across Kilo, Modal, SGLang, Hermes-linked tooling, and DesignArena as the model’s 198B MoE, 256K-context release spread through the stack. The breadth of day-one support gives engineers multiple ways to serve, benchmark, and wire the new open-weight multimodal model into agents.