o1-preview 1

reasoningdeprecatedproprietary

Historical specifications.

Intelligence
Reasoning
Speed
Context
128K
Max output
33K
Input price
$15/1M tokens
Output price
$60/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDo1-preview
Provider Azure AI Foundry
Creator OpenAI
Familyo1
Licenseproprietary
Statusdeprecated
Typereasoning
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window128K tokens
Max input—
Max output33K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Deprecation date
Sourceofficial

Pricing

Text tokensPer 1M tokens
InputCached inputOutput
Standard$15$7.5$60

Family Comparison: o1

ModelContextMax out
o1-mini 2128K66K
o1-preview 1128K33K
o1200K100K

API

GET/v1/models/azure/o1-preview

o1-preview 1

deprecated
o1-preview

Historical specifications.

Changes · 7 entries
o1-previewupdateca7a400Nov 2, 2026, 03:02 AM
nameo1-preview→o1-preview 1
descriptionOlder preview version.→Historical specifications.
o1-previewupdate17bcfbfSep 11, 2026, 06:36 AM
descriptionOlder preview version.→Historical specifications.
o1-previewupdate73d11c6May 18, 2026, 03:39 AM
nameo1-preview→o1-preview 1
o1-previewupdate2b100acMar 23, 2026, 05:30 AM
descriptionOlder preview version.
taglineOlder preview version.
o1-previewupdateb50649fMar 21, 2026, 11:58 PM
model_typereasoning
o1-previewupdatec9a70c5Mar 21, 2026, 08:12 AM
knowledge_cutoffOctober 2023→2023-10
o1-previewcreate7f5c66fMar 21, 2026, 05:16 AM