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OpenAI model

o3

API pricing per million tokens

o3 ReasoningChecked 6h ago
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Input
$2
per 1M, list
Output
$8
per 1M tokens
Cached input
$0.5
batch $1 / $4
Context
200K
100K max output

Price history

$3$10$302026Apr 23, 2025Output $8Input $2

List price since Apr 23, 2025, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.

SeenModelChange
Jun 13, 2025o3Input $10 to $2, Output $40 to $8, Cached input $2.5 to $0.5-80%

Through a gateway

Your own numbers

100M input and 20M output tokens a month: $360.00 direct.

Related models

About o3

o3 is a well-rounded and powerful model across domains.

Takes image, text, files in and returns text. First listed Apr 23, 2025. Blended price $3.5 per 1M tokens at 3 input to 1 output. Overall score 3 on leadersboard.fru.dev (rank 45).

OpenRouter listing OpenAI pricing page
Across fru.devCompany profile4 acquisitionsPay schedule64 releases, latest 2026-09-229 conferences

Questions

How much does o3 cost?

$2 per million input tokens and $8 per million output tokens, with cached input at $0.5, or $1 and $4 through the Batch API.

What is the context window of o3?

200K tokens, with up to 100K tokens of output.

Has o3's price changed?

Yes. The output price went from $40 to $8, first seen Jun 13, 2025.

List prices from providers' pages on the date shown; your contract may differ. Logos via logo.dev; trademarks belong to their owners.

Weekly: LLM API list prices that changed, Thursday mornings.