o3

OpenAIProprietary200k context

o3 is a proprietary model from OpenAI with a 200k-token context window. 2 providers list it, all at $2.00 per million input tokens and $8.00 per million output tokens.

Maker
OpenAI
Licence
Proprietary
Context window
200k
Providers listed
2
Lowest input, per 1M
$2.00
Lowest output, per 1M
$8.00
OpenAI's own API, per 1M
$2.00 in · $8.00 out
Effort settings
Low, Medium, High

Providers serving o3

Cheapest first, by the blended rate of three input tokens to one output token. Prices in US dollars per million tokens, as of 26 Oct 2026.

ProviderInputOutputContextToolsJSON modeOpenAI-compatibleModel ID
Microsoft Azure
Retiring 2026-11-19.
$2.00$8.00200kYes—Noo3
OpenAI
$2.00$8.00200kYesYesYeso3

Benchmark scores

Published scores only, each linked to its source. Compare every model in Bench rankings

BenchmarkDefaultLowMediumHigh
MMMU Pro
Visual reasoning
76.4%———
GPQA Diamond
PhD-level scientific reasoning
—79.8%80.8%81.8%
Humanity's Last Exam
Reasoning & knowledge
———20.3%v

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