gpt-5.1-2025-11-13

reasoningdeprecatedproprietary

Status: Deprecated · Succeeded by gpt-6-sol

Intelligence
Reasoning
Speed
Context
400K
Max output
128K
Input price
$1.25/1M tokens
Output price
$10/1M tokens
Alias ofgpt-5.1

Capabilities

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

Details

Provider OpenAI
Creator openai
Familygpt-5.1
Licenseproprietary
Statusdeprecated
Typereasoning
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window400K tokens
Max input—
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Deprecation date
Retirement date
Successorgpt-6-sol
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

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

Pricing

Text tokensPer 1M tokens
InputCached inputOutput
Standard$1.25$0.125$10

Family Comparison: gpt-5.1

ModelContextMax outPricing
GPT-5.1-Codex Mini400K128K$0.25$2
GPT-5.1-Codex-Max400K128K$1.25$10
GPT-5.1-Codex400K128K$1.25$10
GPT-5.1400K128K$1.25$10

API

GET/v1/models/openai/gpt-5.1-2025-11-13

gpt-5.1-2025-11-13

deprecated

Status: Deprecated

alias → gpt-5.1
Changes · 11 entries
gpt-5.1-2025-11-13updateca7a400Nov 2, 2026, 03:02 AM
descriptionGPT-5.1 is our flagship model for coding and agentic task...→Status: Deprecated
statusactive→deprecated
model_typechat→reasoning
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
endpoints["responses","chat_completions","batch"]→["chat_completions","responses","batch"]
deprecation_date2026-10-01
retirement_date2027-04-01
successorgpt-6-sol
gpt-5.1-2025-11-13updateb2f45bfOct 29, 2026, 03:29 AM
descriptionGPT-5.1 is our flagship model for coding and agentic task...→Status: Deprecated
statusactive→deprecated
model_typechat→reasoning
deprecation_date2026-10-01
retirement_date2027-04-01
successorgpt-6-sol
gpt-5.1-2025-11-13update4e8b6afOct 21, 2026, 06:35 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
gpt-5.1-2025-11-13update118451aSep 24, 2026, 07:08 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
endpoints["responses","chat_completions","batch"]→["chat_completions","responses","batch"]
gpt-5.1-2025-11-13updatefa2bbbbMar 24, 2026, 05:22 AM
capabilitiesjson modeno→yes
gpt-5.1-2025-11-13updatef43e286Mar 24, 2026, 04:45 AM
capabilitiesjson modeyes→nofine tuningnobatchyes
gpt-5.1-2025-11-13update1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
page_urlhttps://platform.openai.com/docs/models/gpt-5.1→https://developers.openai.com/api/docs/models/gpt-5.1?sna...
gpt-5.1-2025-11-13update2b100acMar 23, 2026, 05:30 AM
model_typereasoning→chat
licenseproprietary
release_date2025-11-13
page_urlhttps://platform.openai.com/docs/models/gpt-5.1
open_weightno
tools["function_calling"]
gpt-5.1-2025-11-13updateb50649fMar 21, 2026, 11:58 PM
capabilitiesreasoningyes
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
knowledge_cutoff2024-09
reasoning_tokensyes
reasoning4
taglineGPT-5.1 is our flagship model for coding and agentic task...
endpoints["responses","chat_completions","batch"]
gpt-5.1-2025-11-13updatec9a70c5Mar 21, 2026, 08:12 AM
pricinginput$1.25output$10cached input$0.125batch input$0.625batch output$5
descriptionGPT-5.1 is our flagship model for coding and agentic task...
context_window400000
max_output_tokens128000
model_typereasoning
gpt-5.1-2025-11-13create7f5c66fMar 21, 2026, 05:16 AM