prices synced 2026-07-28

o1-preview

retired

OpenAI · Released Sep 2024

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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

Price history

Price per 1M tokens over timeOutput $60.00; Input $15.00 as of Sep 2024.$0$20.00$40.00$60.00Output on 12 Sep 2024: $60.00Out $60.00Input on 12 Sep 2024: $15.00In $15.00Sep 2024

Snapshots

Effective Input Output Cached in Note Source
12 Sep 2024 $15.00 $60.00 — openai.com/api/pricing

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