o1

reasoningdeprecatedproprietary

Status: Shut down · Succeeded by gpt-5.6-sol

Intelligence
Reasoning
Speed
Context
200K
Max output
100K
Input price
$15/1M tokens
Output price
$60/1M tokens
Snapshots

Capabilities

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

Details

Provider OpenAI
Creator openai
Familyo1
Licenseproprietary
Statusdeprecated
Typereasoning
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window200K tokens
Max input—
Max output100K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Deprecation date
Retirement date
Successorgpt-5.6-sol
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs
File Searchfile_search
Search across uploaded files
MCPmcp
Connect to Model Context Protocol servers

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.openai.com/v1/chat/completions
ResponsesPOST
Stateful multi-turn conversationshttps://api.openai.com/v1/responses
AssistantsPOST
Persistent assistants with tools and fileshttps://api.openai.com/v1/assistants
BatchPOST
Async batch processing at lower costhttps://api.openai.com/v1/batches

Pricing

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

Family Comparison: o1

ModelContextMax outPricing
o1-mini128K66K$1.1$4.4
o1 Preview128K33K$15$60
o1200K100K$15$60
o1-pro200K100K$150$600

API

GET/v1/models/openai/o1

o1

deprecated

Status: Shut down

o1-2024-12-17
Changes · 13 entries
o1updateca7a400Nov 2, 2026, 03:02 AM
descriptionThe o1 series of models are trained with reinforcement le...→Status: Shut down
statusactive→deprecated
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
tools["function_calling"]→["function_calling","file_search","mcp"]
page_urlhttps://developers.openai.com/api/docs/models/o1?snapshot...→https://developers.openai.com/api/docs/models/o1
deprecation_date2026-04-22
retirement_date2026-10-23
successorgpt-5.6-sol
o1updateb2f45bfOct 29, 2026, 03:29 AM
descriptionThe o1 series of models are trained with reinforcement le...→Status: Shut down
o1update4e8b6afOct 21, 2026, 06:35 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
o1update118451aSep 24, 2026, 07:08 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
deprecation_date2026-04-22
retirement_date2026-10-23
successorgpt-5.6-sol
o1updatee3d7dedAug 31, 2026, 04:13 AM
statusactive→deprecated
tools["function_calling"]→["function_calling","file_search","mcp"]
page_urlhttps://developers.openai.com/api/docs/models/o1?snapshot...→https://developers.openai.com/api/docs/models/o1
o1updatee8ec634Mar 24, 2026, 07:27 PM
knowledge_cutoff2023-09→2023-10
o1updatefa2bbbbMar 24, 2026, 05:22 AM
capabilitiesjson modeno→yes
o1updatef43e286Mar 24, 2026, 04:45 AM
capabilitiesjson modeyes→nofine tuningnobatchyes
o1update1cd659eMar 24, 2026, 04:19 AM
knowledge_cutoff2023-10→2023-09
capabilitiesjson modeyes
page_urlhttps://platform.openai.com/docs/models/o1→https://developers.openai.com/api/docs/models/o1?snapshot...
o1updateb301ebeMar 23, 2026, 11:47 PM
knowledge_cutoff2023-09→2023-10
o1update2b100acMar 23, 2026, 05:30 AM
tools["function_calling","file_search","mcp"]→["function_calling"]
licenseproprietary
page_urlhttps://platform.openai.com/docs/models/o1
open_weightno
release_date2024-12-17
o1updateb50649fMar 21, 2026, 11:58 PM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
descriptionThe latest and strongest model family from OpenAI, o1 is ...→The o1 series of models are trained with reinforcement le...
capabilitiesstreamingyesvisionyes
knowledge_cutoff2023-09
model_typereasoning
reasoning_tokensyes
reasoning4
taglinePrevious full o-series reasoning model
tools["function_calling","file_search","mcp"]
endpoints["chat_completions","responses","assistants","batch"]
o1create7f5c66fMar 21, 2026, 05:16 AM