o4-mini pricing
o4-mini from OpenAI costs $1.10 per 1M input tokens and $4.40 per 1M output tokens. Cached input is $0.275 per 1M. Context window 200,000 tokens.
API id o4-mini · OpenAI · source · updated 2026-08-12
$1.10
Input / 1M tokens
$4.40
Output / 1M tokens
$0.275
Cached input / 1M
200K
Context window
What o4-mini costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0033 |
| Document summary | 50,000 | 2,000 | $0.06 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $1.98 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does o4-mini cost per 1M tokens?
- o4-mini costs $1.10 per 1M input tokens and $4.40 per 1M output tokens on the standard tier. Cached input is $0.275 per 1M.
- What is o4-mini's context window?
- o4-mini 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 o4-mini?
- Yes. gpt-4o-mini-2024-07-18 is $0.300 per 1M input tokens versus $1.10 for o4-mini, with a 128,000 token context window.
- Where does this o4-mini price come from?
- Directly from OpenAI's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.