PriceIndex
ST

Step 3.7 Flash

step-3.7-flash
APIProvider site

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... Built by StepFun.

Prices updated

Input price

$0.20

per 1M tokens · Standard

Output price

$1.15

per 1M tokens · Standard

Input limit

262K

tokens

Output limit

230K

tokens

Input formats

TextImageVideoAudioPDF

Output formats

TextImageVideoAudioPDF
Compare

Step 3.7 Flash price history

2 price records since 10/8/2026

Step 3.7 Flash cost calculator

Input20M tokens
Output5M tokens

$9.75/month

Standard pricing

    Overview

    What is Step 3.7 Flash?

    Step 3.7 Flash is a text & reasoning and vision model from StepFun. 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... Its 262K context window and $0.20 input price make it a candidate for cost-sensitive, high-throughput applications.

    Image understandingDocument analysisContent workflowsClassification

    Rates

    Step 3.7 Flash pricing

    Pricing is based on token usage. Provider-specific caching, batch, regional, and tool charges may affect the final cost.

    Input · Standard

    $0.20

    Per 1M tokens

    Cached input · Standard

    $0.04

    Per 1M tokens

    Capabilities

    Step 3.7 Flash Tools

    Tools available when using Step 3.7 Flash through supported provider APIs.

    Function calling

    Supported

    Structured outputs

    Supported

    JSON mode

    Supported

    Reasoning

    Supported

    Built-in web search

    Not supported

    Log probabilities

    Supported

    Deterministic seed

    Supported

    Parallel tool calls

    Not supported

    Prompt caching

    Supported

    Strengths and limitations

    Strengths

    • Low input cost at $0.20 per million tokens suits high-volume workloads.
    • 262K context supports large documents, repositories and extended conversations.
    • Supports text & reasoning and vision workloads in one model.

    Limitations

    • Generated tokens cost 6× more than input tokens, which matters for verbose responses.
    • Large context capacity does not guarantee consistent retrieval across the entire prompt.
    • Arena Elo and MMLU-Pro are directional; test accuracy, latency and reliability on your own workload before committing.

    Arena Elo, MMLU-Pro and pricing figures are illustrative; validate current vendor terms before purchase.

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    Frequently asked questions about Step 3.7 Flash

    Step 3.7 Flash is a text & reasoning and vision model from StepFun. 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...