openai
OpenAI: o3 Pro API Pricing
OpenAI: o3 Pro costs $20.00 per 1M input tokens and $80.00 per 1M output tokens. Context window: 200K. Prices verified 2026-08-23 Β· source
Input / 1M tokens
$20.00
Output / 1M tokens
$80.00
Context window
200K
Max output
100K
What would OpenAI: o3 Pro cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $480.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $1600.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $3600.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $960.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: o3 Pro
The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently...
Compare OpenAI: o3 Pro with
Official resources
- OpenAI: o3 Pro on OpenRouter β live endpoint, pricing source of record.
- Get an OpenRouter API key β β one key, every model including Pro. Free credits on signup.
- Shred your current bill β paste a CSV and see if switching saves money.