Step 3.7 Flash

Stepfun chatreasoningtool_usevideovision Long

API ID: stepfun/step-3.7-flash-20260528

Compare Calculate
Input Price
$0.20
/1M tokens
Output Price
$1.15
/1M tokens
Cached Input
$0.04
Save 80%

About Step 3.7 Flash

Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...

💰
Price Ranking
#872 lowest price among 1240 Chat models

Model Specifications

Context Length
262k
Max Output
33k
Release Date
2026-05-28
Capabilities
chat reasoning tool_use video vision
Input Modalities
textimagevideo
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Image analysis, document understanding, visual Q&A
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Simple Q&A (cheaper models available)

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

Personal AI Assistant
$0.43
/month
50 conversations/day, ~500 tokens each
Customer Service Bot
$13.35
/month
1000 tickets/day, ~800 tokens each
Data Analysis Pipeline
$18.30
/month
500 analyses/day, ~2k tokens each
Calculate Your Custom Usage

Stepfun Model Lineup

Compare all models from Stepfun to find the best fit

Model Input Output Context Capabilities
Step 3.7 Flash Current $0.20 $1.15 262k chat reasoning tool_use video vision
Step 3.5 Flash (free) $0.10 $0.30 262k chat reasoning tool_use
Step 3.5 Flash (free) $0.10 $0.30 262k chat reasoning tool_use
View All Stepfun Models →

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💡 Cheaper Alternatives

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Step 3.5 Flash (free)
$0.10 $0.30 262k

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🚀 Quick Start

Get started with Step 3.7 Flash API

OpenAI-compatible SDK 
from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="stepfun/step-3.7-flash-20260528",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

Resources

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