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Input / 1M
$0.200
Output / 1M
$1.15
Context
256K tokens
Max output
256K tokens
Input
Text, Image, Video
Released
4mo ago
Pricing
Input tokens$0.200 per 1M
Output tokens$1.15 per 1M
Provider list priceExactly what your balance is debited; our fee is charged when you buy credits
About Step 3.7 Flash
Newer StepFun flash model for faster agents, coding, and multimodal prompts
VisionReasoningTools
What it supports
- Tool calling (function calling)
- JSON mode and structured output
- Image input (vision)
- Audio input
- Extended reasoning
- Streaming responses
- OpenAI SDK, Anthropic SDK and any OpenAI-compatible client
Make a request
curl https://rapidrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "stepfun/step-3.7-flash",
"messages": [{ "role": "user", "content": "Hello" }]
}'Frequently asked
How do I call Step 3.7 Flash through an OpenAI-compatible API?
Point any OpenAI-compatible client at https://rapidrouter.ai/api/v1 with a Rapid Router API key and set the model to stepfun/step-3.7-flash. The chat completions endpoint is https://rapidrouter.ai/api/v1/chat/completions.
What is the context window of Step 3.7 Flash?
Step 3.7 Flash has a context window of 256,000 tokens on Rapid Router, and returns up to 256,000 output tokens per reply.
What can Step 3.7 Flash do?
On Rapid Router, Step 3.7 Flash supports tool calling, image input, extended reasoning.