o1-preview
retiredOpenAI · Frontier
First reasoning model — introduced chain-of-thought billing where thinking tokens are charged as output.
Input / 1M
$15.00
Output / 1M
$60.00
Cached input / 1M
—
Context window
128K
Where it sits
624% above the frontier median
blended $/Mtok across 24 frontier models
Output costs 4× input
$15.00 in / $60.00 out per 1M
Held flat since launch (Sep 2024)
no blended price change recorded
Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.
Price history
Only one price on record so far — the history chart appears once a price changes.
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 12 Sep 2024 | $15.00 | $60.00 | — | openai.com/api/pricing |