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Vercel AI Gateway

Step 3.7 Flash API

Vercel AI Gateway
About

Build advanced reasoning agents with Step 3.7 Flash, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.20/1M input and $1.15/1M output tokens, native tool calling support. Access Step 3.7 Flash via the Vercel AI Gateway API with up to 256K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
256K

Tokens

Input Limit
256K

Tokens

Max Output
256K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.20
Output
$1.15

Caching (per 1M tokens)

Read
$0.04
Frequently Asked Questions

Step 3.7 Flash by Vercel AI Gateway costs $0.20 per 1M input tokens and $1.15 per 1M output tokens. Cached reads cost $0.04 per 1M tokens.

Model Details
ID
stepfun/step-3.7-flash
Provider
Vercel AI Gateway
Family
step
Release Date
May 28, 2026
Knowledge Cutoff
Jan 1, 2026
API Integration
NPM Package
@ai-sdk/gateway
Environment Variables
AI_GATEWAY_API_KEY
Documentation