o3 price 80% cut on 2025-06-10
On 2025-06-10, OpenAI changed the published API price of o3. The superseded price had stood for 55 days. This is the only recorded price change for this model in the index.
Every metered token direction on o3 got cheaper that day. A cut is the direction people notice least, because a lower bill rarely prompts anyone to check what changed.
What changed
| Per 1M tokens | Before | After | Change |
|---|---|---|---|
| Input | $10.00 | $2.00 | -80% |
| Output | $40.00 | $8.00 | -80% |
What it meant in practice
On a reference workload of 50M input and 5M output tokens a month, this change moved the bill from $700.00 to $140.00 a month, a difference of $560.00. The workload is a fixed reference used on every event page so the figures are comparable between them, not a measurement of anyone's usage.
Your recorded history should not change when prices do
A cost tracker carrying a single current-price table would reprice every o3 session you ran before 2025-06-10 at the new rate, silently restating months you already paid for. See what this change does to a real session, and why dated windows are the fix.
Provenance
Every value here carries a first-party source, and superseded prices are kept rather than overwritten. Windows before the index began are reconstructed from web archives and labelled as archived rather than claimed as first-party.
| Window | Source |
|---|---|
| Input, 2025-04-16 to 2025-06-10 | https://openai.com/index/o3-o4-mini/ |
| Input, from 2025-06-10 | https://developers.openai.com/api/docs/pricing |
| Output, 2025-04-16 to 2025-06-10 | https://openai.com/index/o3-o4-mini/ |
| Output, from 2025-06-10 | https://developers.openai.com/api/docs/pricing |
Related
Derived from the AI Price Index, last updated 2026-07-25. Licensed CC BY 4.0: reuse this with credit to the dataset page.