Tier
Moderate
Headquarters
Shanghai, China
Founded
2023
Flagship
Step
Models tracked
4
Artificial Analysis
Top intelligence
42.6
Artificial Analysis Index
Cheapest model
$0.00
blended /1M
Fastest output
196
tokens / sec
Flagship
StepFun’s top-scoring model on the Artificial Analysis Intelligence Index.
Most intelligent model
Step 3.7 Flash
Released 2026-05-29
Intelligence
42.6
Coding
37.1
Math
—
In $/1M
$0.20
Out $/1M
$1.15
Speed t/s
175
Benchmark breakdown
Models & benchmarks
Every StepFun model on file — intelligence, coding, price, and speed.
| Model | Released | Intel | Coding | Math | In $/1M | Out $/1M | Speed t/s | Latency s |
|---|---|---|---|---|---|---|---|---|
| Step 3.7 Flash | 2026-05-29 | 42.6 | 37.1 | — | $0.20 | $1.15 | 175 | 0.97 |
| Step 3.5 Flash 2603 | 2026-04-02 | 38.5 | 34.6 | — | $0.10 | $0.30 | 196 | 1.31 |
| Step 3.5 Flash | 2026-02-02 | 37.8 | 31.6 | — | $0.10 | $0.30 | 178 | 1.03 |
| Step3 VL 10B | 2026-01-20 | 15.5 | 13.9 | — | $0.00 | $0.00 | 0 | 0.00 |
Trajectory
StepFun’s model releases over time, by intelligence.
House strengths
Where StepFun’s lineup over-indexes, averaged across its models.
Capability profile
Best value
Step 3.5 Flash 2603
Most intelligence per dollar — 38.5 index at $0.15/1M blended.
257 index points per $1
Overview
A Chinese foundation-model startup building the multimodal Step family across text, vision, and audio.
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