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AI/ML API

o3 Pro API

AI/ML API
About

Build advanced reasoning agents with o3 Pro, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $27.51/1M input and $110.03/1M output tokens, native tool calling support. Access o3 Pro via the AI/ML API API with up to 100K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
200K

Tokens

Input Limit
200K

Tokens

Max Output
100K

Tokens

Pricing

Standard (per 1M tokens)

Input
$27.51
Output
$110.03
Frequently Asked Questions

o3 Pro by AI/ML API costs $27.51 per 1M input tokens and $110.03 per 1M output tokens.

Model Details
ID
openai/o3-pro
Provider
AI/ML API
Family
o-pro
Release Date
Jun 10, 2025
Knowledge Cutoff
May 1, 2024
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
AIMLAPI_API_KEY
API Base URL
https://api.aimlapi.com/v1
Documentation