← All AI models
OpenAI
o3 Pricing
OpenAI reasoning model. Pricing updated March 2026.
Official OpenAI docs →Pricing
Input tokens
$2.00per 1M tokens
$0.0020 per 1,000 tokens
Output tokens
$8.00per 1M tokens
$0.0080 per 1,000 tokens
Specifications
- Context window
- 128K tokens
- Provider
- OpenAI
Best use cases
- Extended reasoning
- Math and logic
- Research and analysis
- Complex problem-solving
Other OpenAI models
Estimate your costs at scale
Use our free tools to calculate monthly spend based on your request volume and token usage.
Know your total. Now find out which customers are driving it.
PerUnit breaks down AI spend by customer, feature, and pricing tier.
Get early access to PerUnit