Models / openai
o3 pricing
Input
$2
per 1M tokens
Output
$8
per 1M tokens
100k calls / month*
$480.00
*1,200 in / 300 out avg tokens
provider list price · as of 2026-08-21 · source: the same table ReasonRank uses in production
How much does o3 cost per million tokens?
o3 costs $2 per million input tokens and $8 per million output tokens (list price, as of 2026-08-21).
What does o3 cost at 100k calls a month?
At 100,000 calls/month averaging 1,200 input and 300 output tokens, o3 costs about $480.00/month at list prices.
Is a cheaper model good enough to replace o3?
Price tables can’t answer that — it depends on your workload. ReasonRank tests candidate models on your own cases with a statistical non-inferiority gate, then verifies savings on live traffic.
Wondering if o3 is over- or under-powered for your workload? Estimate with the free calculator, see what a verified switch decision looks like, or test it on your own cases — ReasonRank verifies the answer with a statistical gate, for cents.