o3-pro API pricing
Blended at 3:1 input to output: $35.00 per million tokens.
OpenRouter charges $20.00 per million input tokens and $80.00 per million output tokens. 4 of the models nearest it in price are cheaper on a blended basis.
Against the models nearest in price
Blended at a 3:1 input to output ratio.
| Source | ||||||
|---|---|---|---|---|---|---|
| o3-pro This model | OpenRouter | $20.00 | $80.00 | 200,000 | $35.00 | ↗ |
| gpt-4 | OpenAI | $30.00 | $60.00 | 8,192 | $37.50 | ↗ |
| gpt-4-0314 | OpenAI | $30.00 | $60.00 | 8,192 | $37.50 | ↗ |
| gpt-4-0613 | OpenAI | $30.00 | $60.00 | 8,192 | $37.50 | ↗ |
| claude-opus-4-1 | Anthropic | $15.00 | $75.00 | 200,000 | $30.00 | ↗ |
| claude-opus-4 | OpenRouter | $15.00 | $75.00 | 200,000 | $30.00 | ↗ |
| claude-opus-4.1 | OpenRouter | $15.00 | $75.00 | 200,000 | $30.00 | ↗ |
| gpt-5-pro | OpenRouter | $15.00 | $120.00 | 400,000 | $41.25 | ↗ |
| gpt-5.6-cyber | OpenAI | $12.50 | $75.00 | 400,000 | $28.13 | ↗ |
Last checked . Methodology
Questions
How much does o3-pro cost per million tokens?
$20.00 per million input tokens and $80.00 per million output tokens. At a 3:1 input to output mix that blends to $35.00. Checked 12 Sept 2026.
What would o3-pro cost for a real workload?
A thousand requests a day at 2,000 input and 600 output tokens each comes to $2,640.00 a month.
What is the context window for o3-pro?
200,000 tokens of input, with up to 100,000 tokens of output.
gpt-4 · gpt-4-0314 · gpt-4-0613 · claude-opus-4-1 · claude-opus-4 · All OpenRouter models · Cost calculator