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StepFun AI

StepFun AI

8 models available

Documentation

Models

Browse all models from StepFun AI

Step 3.5 Flash

stepfun-ai

ReasoningTool UseOpen Weights

Input

$0.10/1M

Output

$0.30/1M

Context

256K

Max Output

256K

Step 3.5 Flash 2603

stepfun-ai

ReasoningTool UseOpen Weights

Input

$0.10/1M

Output

$0.30/1M

Context

256K

Max Output

256K

Step 2 (16K)

stepfun-ai

ReasoningTool Use

Input

$5.21/1M

Output

$16.44/1M

Context

16K

Max Output

8K

Step TTS 2

stepfun-ai

Input

Free/1M

Output

Free/1M

Context

N/A

Max Output

N/A

StepAudio 2.5 ASR

stepfun-ai

Input

Free/1M

Output

Free/1M

Context

N/A

Max Output

N/A

StepAudio 2.5 TTS

stepfun-ai

Input

Free/1M

Output

Free/1M

Context

N/A

Max Output

N/A

Step 3.7 Flash

stepfun-ai

ReasoningTool UseOpen WeightsVision

Input

$0.20/1M

Output

$1.15/1M

Context

256K

Max Output

256K

Step 1 (32K)

stepfun-ai

ReasoningTool Use

Input

$2.05/1M

Output

$9.59/1M

Context

33K

Max Output

33K

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