o3 Pro API price
openai/o3-pro
The cheapest o3 Pro API is $20.00/M input at Official - OpenAI - all 2 providers compared below, per 1M tokens.
FlagshipOpenAI200K context2 sellers
Input
$20.00
per 1M tokens · Official - OpenAI
Output
$80.00
per 1M tokens · Official - OpenAI
Where to buy it
Cheapest o3 Pro API providers compared - 2 sellers, from $20.00/M.
| Provider | Input $/M | Output $/M |
|---|---|---|
| Official - OpenAI | 20.00cheapest | 80.00 |
| Batch | 10.00 | 40.00 |
| OpenRouter (aggregator) | 20.00 | 80.00 |
Against its tier
- This model$100.00
- Cheapest · GLM 5.3 Flash$0.29
- Tier median · Kimi K3$9.00
- Dearest · GPT 5.5 Pro (04-23 snapshot)$330.00
#27 of 32 flagship · cheaper than 16%
Details
- Context window
- 200K200,000 tokens
- Developer
- OpenAI
- Intelligence
- 33.3
- Sellers
- 2
- Cheapest at
- Official - OpenAI
- Combined
- $100.00in + out per 1M
- Last checked
- 2026-08-28