o3 pricing
o3 from OpenAI costs $2.00 per 1M input tokens and $8.00 per 1M output tokens. Cached input is $0.500 per 1M. Context window 200,000 tokens.
API id o3 · OpenAI · source · updated 2026-08-11
$2.00
Input / 1M tokens
$8.00
Output / 1M tokens
$0.500
Cached input / 1M
200K
Context window
What o3 costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0060 |
| Document summary | 50,000 | 2,000 | $0.12 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $3.60 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does o3 cost per 1M tokens?
- o3 costs $2.00 per 1M input tokens and $8.00 per 1M output tokens on the standard tier. Cached input is $0.500 per 1M.
- What is o3's context window?
- o3 accepts up to 200,000 tokens in a single request, and can return up to 100,000 output tokens.
- Is there a cheaper OpenAI model than o3?
- Yes. gpt-4o-mini-2024-07-18 is $0.300 per 1M input tokens versus $2.00 for o3, with a 128,000 token context window.
- Where does this o3 price come from?
- Directly from OpenAI's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.
Other OpenAI models
- gpt-5.6-sol $5.00
- gpt-5.6-terra $2.00
- gpt-5.6-luna $0.200
- gpt-5.5 (<272K context length) $5.00
- gpt-5.5-pro (<272K context length) $30.00
- gpt-5.4 (<272K context length) $2.50
- gpt-5.4-mini $0.750
- gpt-5.4-nano $0.200
- gpt-5.4-pro (<272K context length) $30.00
- gpt-5.2 $1.75
- gpt-5.2-pro $21.00
- gpt-5.1 $1.25
- gpt-5 $1.25
- gpt-5-mini $0.250
- gpt-5-nano $0.050
- gpt-5-pro $15.00