AI Model APIs
AI Model APIsProviders
AI Model APIs

The complete platform for comparing AI models. Find pricing, capabilities, and the perfect model for your use case.

contact@aimodelapis.com

Resources

  • AI Models APIs
  • Providers

About

  • About
  • Contact
  • Privacy Policy
  • Terms of Service

© 2026 AI Model APIs. All rights reserved.

Back to Models
AI/ML API

Step 5 Preview API

AI/ML API
About

Build advanced reasoning agents with Step 5 Preview, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.38/1M input and $3.71/1M output tokens, native tool calling support. Access Step 5 Preview via the AI/ML API API with up to 64K output tokens.

Capabilities

Input Modalities

textimagevideo

Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
64K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.38
Output
$3.71

Caching (per 1M tokens)

Read
$0.07
Frequently Asked Questions

Step 5 Preview by AI/ML API costs $1.38 per 1M input tokens and $3.71 per 1M output tokens. Cached reads cost $0.07 per 1M tokens.

Model Details
ID
stepfun/step-5-preview
Provider
AI/ML API
Family
Release Date
Sep 16, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
AIMLAPI_API_KEY
API Base URL
https://api.aimlapi.com/v1
Documentation