o3-mini
OpenAI's cost-efficient reasoning model available on free tier with strong STEM performance
o3-mini
OpenAI • January 2025
Training Data
Up to October 2024
o3-mini
January 2025
Parameters
~100 billion
Training Method
Reinforcement Learning with Reasoning
Context Window
200,000 tokens
Knowledge Cutoff
October 2024
Key Features
Free Tier Access • Cost Efficient Reasoning • STEM Focus • Three Effort Levels
Capabilities
Reasoning: Excellent
Math: Outstanding
Coding: Excellent
What's New in This Version
First reasoning model available on free tier, 3 effort levels for cost-speed tradeoffs
OpenAI's cost-efficient reasoning model available on free tier with strong STEM performance
What's New in This Version
First reasoning model available on free tier, 3 effort levels for cost-speed tradeoffs
Technical Specifications
Key Features
Capabilities
Other OpenAI Models
Explore more models from OpenAI
GPT-5.6 Sol
OpenAI's flagship GPT-5.6 model — its most capable system yet for complex coding, cybersecurity, and scientific reasoning, with new max reasoning effort and ultra subagent mode
GPT-5.6 Terra
The balanced mid-tier of the GPT-5.6 family — matches GPT-5.5 quality on high-volume business tasks at roughly half the price
GPT-5.6 Luna
The fastest, most cost-efficient GPT-5.6 model — strong everyday capability at OpenAI's lowest price for summarization, drafting, and routine automation