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StepFun

StepFun

4 models available

Documentation

Models

Browse all models from StepFun

Step 3.5 Flash

stepfun

ReasoningTool UseOpen Weights

Input

$0.10/1M

Output

$0.29/1M

Context

256K

Max Output

256K

Step 2 (16K)

stepfun

ReasoningTool Use

Input

$5.21/1M

Output

$16.44/1M

Context

16K

Max Output

8K

Step 1 (32K)

stepfun

ReasoningTool Use

Input

$2.05/1M

Output

$9.59/1M

Context

33K

Max Output

33K

Step 3.5 Flash 2603

stepfun

ReasoningTool UseOpen Weights

Input

$0.10/1M

Output

$0.30/1M

Context

256K

Max Output

256K

API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
STEPFUN_API_KEY
API Base URL
https://api.stepfun.com/v1
Documentation