o1-preview
Reasoning
Public preview of o1, retired when o1 reached GA. Listed for historical reference.
o1-preview is a reasoning AI model from OpenAI. It costs $15.000 per million input tokens and $60.000 per million output tokens (blended $28.500/M), with a 128,000-token context window.
INPUT
$15.000/M
per million input tokens
OUTPUT
$60.000/M
per million output tokens
CONTEXT
128,000
tokens
Benchmarks
vs. best public score
Scores inherited from o1 — this is a hosted variant of the same open-weights model, so the underlying benchmark scores are identical.
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources, treat as directional rather than authoritative.
More from OpenAI
See all 28 →GPT-5.6 Sol
Frontier · 1,050,000 ctx
in $5.000/Mout $30.000/M
GPT-5.6 Terra
Balanced · 1,050,000 ctx
in $2.000/Mout $12.000/M
GPT-5.6 Luna
Efficient · 1,050,000 ctx
in $0.200/Mout $1.200/M
GPT-5.5
Frontier · 1,050,000 ctx
in $5.000/Mout $30.000/M
GPT-5.2
Frontier · 400,000 ctx
in $1.750/Mout $14.000/M
GPT-5.2-Codex
Coding · 400,000 ctx
in $1.750/Mout $14.000/M
Frequently asked questions
How much does o1-preview cost?
o1-preview costs $15.000 per million input tokens and $60.000 per million output tokens, for a blended reference rate of $28.500 per million tokens.
What is o1-preview's context window?
o1-preview supports up to 128,000 tokens of context in a single request.
What is o1-preview best for?
Public preview of o1, retired when o1 reached GA. Listed for historical reference.
Who makes o1-preview?
o1-preview is developed and served by OpenAI.