Tier
Moderate
Headquarters
Shanghai, China
Founded
2023
Flagship
Step
Models tracked
4
Artificial Analysis
Top intelligence
30.3
Artificial Analysis Index
Cheapest model
$0.00
blended /1M
Fastest output
403
tokens / sec
Flagship Model
StepFun’s top-scoring model on the Artificial Analysis Intelligence Index.
Most intelligent model
Step 3.7 Flash
Released 2026-05-29
Intelligence
30.3
Coding
39.6
Math
—
In $/1M
$0.20
Out $/1M
$1.15
Speed t/s
403
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 | 30.3 | 39.6 | — | $0.20 | $1.15 | 403 | 0.74 |
| Step 3.5 Flash 2603 | 2026-04-02 | 26.0 | — | — | $0.10 | $0.30 | 279 | 0.76 |
| Step 3.5 Flash | 2026-02-02 | 25.5 | — | — | $0.10 | $0.30 | 0 | 0.00 |
| Step3 VL 10B | 2026-01-20 | 9.5 | — | — | $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 — 26.0 index at $0.15/1M blended.
173 index points per $1
Governance
StepFun’s license posture and openness across its lineup.
Open weight
2
of 2 models
Proprietary
0
of 2 models
Commercial-OK
2
license permits
Modalities
Image · Text
Via LLM Stats