ModelPricing.aio3-pro API Pricing
o3-pro costs $20.00 per million input tokens and $80.00 per million output tokens on the OpenAI API. Prices are tracked from the official OpenAI pricing table and used by the ModelPricing.ai estimation API, so this page and the API always quote the same numbers. See all OpenAI model pricing or the full LLM pricing comparison.
o3-pro Pricing Per Million Tokens
| Tier | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M |
|---|---|---|---|---|
| Standard | $20.00 | $80.00 | — | — |
What o3-pro Costs In Practice
Monthly cost at three representative workloads, using the standard text rate in effect today.
| Workload | Monthly cost |
|---|---|
| Light — 1M in / 200K out | $36.00 |
| Moderate — 10M in / 2M out | $360.00 |
| Heavy — 100M in / 20M out | $3600.00 |
Need your own numbers? Use the LLM cost calculator or call the estimation API directly.
Compare o3-pro With Other Models
Looking for something cheaper from OpenAI? GPT-5 Nano is the lowest-priced option on input tokens.
o3-pro Pricing FAQ
How much does o3-pro cost per token?
o3-pro costs $20.00 per million input tokens and $80.00 per million output tokens on the OpenAI API. That works out to $0.0200 per thousand input tokens.
How much does it cost to run o3-pro per month?
At 1M in / 200K out per month, o3-pro costs about $36.00. A heavier workload of 100M input and 20M output tokens costs about $3600.00.
Estimate o3-pro costs programmatically
POST a token count to /v1/estimate with model o3-pro and get a priced breakdown back, promotions
already applied.