OpenAI o3 API pricing
OpenAI's 2025 reasoning model line.
Input
$2.00
per 1M tokens
Cached input
$0.50
per 1M tokens
Output
$8.00
per 1M tokens
Context window
200K
max output 100K
Prices last synced Aug 20, 2026 from the LiteLLM community price catalog — the same catalog Marginal prices real usage events against, refreshed daily. Hand-checked against the provider's official pricing page on Aug 20, 2026. Spot an error? Tell us.
Pricing notes
- Batch and Flex tiers are 50% off these rates; Fast mode is roughly 2x (varies by model).
What would OpenAI o3 cost you?
Enter your workload — add other models to compare the same traffic across providers.
Your monthly workload
Cache hit rate = share of input tokens served from the provider's prompt cache, billed at the model's cached-input price. Estimates use standard per-token rates — batch discounts, service tiers, and long-context surcharges are not applied.
| Model | Input | Cached input | Output | Per request | Monthly |
|---|---|---|---|---|---|
| OpenAI o3 | $1,200 | $200 | $2,000 | $0.00680 | $3,400 |
More from OpenAI
Tracking OpenAI o3 in production?
Marginal prices every call your app actually makes — cached tokens, dated snapshots, model switches included — and slices spend by customer or feature. One track() call to integrate.