StepFun AI
8 models available
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