o3 pricing
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. 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 2026-09-25 · general-purpose
$2.00
Input / 1M tokens
$8.00
Output / 1M tokens
$0.500
Cached input / 1M
200K
Context window
o3 specifications
- Provider
- OpenAI
- API id
o3- Model type
- general-purpose
- Context window
- 200K tokens
- Max output
- 100K tokens
- Currency
- USD
- Price source
- First-party
- Last checked
- 2026-09-25
Tags
- reasoning
o3 across providers
The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.
| Provider | Input /1M | Cached /1M | Output /1M | 1M in + 1M out | vs vendor |
|---|---|---|---|---|---|
| $2.00 | $0.500 | $8.00 | $10.00 | — | |
OpenRouterHost | $2.00 | $0.500 | $8.00 | $10.00 | — |
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. omni-moderation-latest is free per 1M input tokens versus $2.00 for o3.
- 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.