GPT-4.1 nano

deprecatedproprietary

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

Intelligence
Speed
Context
1.0M
Max output
33K
Input price
$0.1/1M tokens
Output price
$0.4/1M tokens
Snapshots

Capabilities

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

Details

Model IDgpt-4.1-nano
Provider OpenAI
Creator openai
Familygpt-4.1
Licenseproprietary
Statusdeprecated
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window1.0M tokens
Max input—
Max output33K tokens
Reasoning tokens—
Knowledge cutoff
Release date
Deprecation date
Retirement date
Successorgpt-5.6-luna
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs
File Searchfile_search
Search across uploaded files
Image Generationimage_generation
Generate images inline
Code Interpretercode_interpreter
Execute code in a sandbox
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
Fine-tuningPOST
Train custom models on your datahttps://api.openai.com/v1/fine_tuning/jobs

Pricing

Fine-tuning
TrainingInputCached inputOutput
Standard$1.5$0.2$0.05$0.8
Batch$1.5$0.1$0.025$0.4

Family Comparison: gpt-4.1

ModelContextMax outPricing
GPT-4.1 nano1.0M33K$0.1$0.4
GPT-4.1 Mini1.0M33K$0.4$1.6
GPT-4.11.0M33K$2$8

API

GET/v1/models/openai/gpt-4.1-nano

GPT-4.1 nano

deprecated
gpt-4.1-nano

Status: Shut down

gpt-4.1-nano-2025-04-14
Changes · 13 entries
gpt-4.1-nanoupdateca7a400Nov 2, 2026, 03:02 AM
descriptionGPT-4.1 nano excels at instruction following and tool cal...→Status: Shut down
statusactive→deprecated
pricingtiers[{"label":"Fine-tuning","unit":"","columns":["Training","...→[{"label":"Fine-tuning","unit":"","columns":["Training","...
tools["function_calling"]→["function_calling","file_search","image_generation","cod...
page_urlhttps://developers.openai.com/api/docs/models/gpt-4.1-nan...→https://developers.openai.com/api/docs/models/gpt-4.1-nano
deprecation_date2026-04-22
retirement_date2026-10-23
successorgpt-5.6-luna
gpt-4.1-nanoupdateb2f45bfOct 29, 2026, 03:29 AM
descriptionGPT-4.1 nano excels at instruction following and tool cal...→Status: Shut down
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Fine-tuning","unit":"","columns":["Training","...
gpt-4.1-nanoupdate4e8b6afOct 21, 2026, 06:35 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
gpt-4.1-nanoupdate118451aSep 24, 2026, 07:08 AM
descriptionGPT-4.1 nano excels at instruction following and tool cal...→GPT-4.1 nano excels at instruction following and tool cal...
pricingtiers[{"label":"Fine-tuning","unit":"","columns":["Training","...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
deprecation_date2026-04-22
retirement_date2026-10-23
successorgpt-5.6-luna
gpt-4.1-nanoupdatee3d7dedAug 31, 2026, 04:13 AM
statusactive→deprecated
tools["function_calling"]→["function_calling","file_search","image_generation","cod...
page_urlhttps://developers.openai.com/api/docs/models/gpt-4.1-nan...→https://developers.openai.com/api/docs/models/gpt-4.1-nano
gpt-4.1-nanoupdatee8ec634Mar 24, 2026, 07:27 PM
knowledge_cutoff2024-05→2024-06
gpt-4.1-nanoupdatefa2bbbbMar 24, 2026, 05:22 AM
capabilitiesjson modeno→yes
gpt-4.1-nanoupdatef43e286Mar 24, 2026, 04:45 AM
capabilitiesjson modeyes→noreasoningnobatchyes
gpt-4.1-nanoupdate1cd659eMar 24, 2026, 04:19 AM
knowledge_cutoff2024-06→2024-05
capabilitiesjson modeyes
page_urlhttps://platform.openai.com/docs/models/gpt-4.1-nano→https://developers.openai.com/api/docs/models/gpt-4.1-nan...
gpt-4.1-nanoupdateb301ebeMar 23, 2026, 11:47 PM
knowledge_cutoff2024-05→2024-06
gpt-4.1-nanoupdate2b100acMar 23, 2026, 05:30 AM
tools["function_calling","file_search","image_generation","cod...→["function_calling"]
licenseproprietary
page_urlhttps://platform.openai.com/docs/models/gpt-4.1-nano
open_weightno
release_date2025-04-14
gpt-4.1-nanoupdateb50649fMar 21, 2026, 11:58 PM
namegpt-4.1-nano→GPT-4.1 nano
pricingtiers[{"label":"Fine-tuning","unit":"","columns":["Training","...
capabilitiesstreamingyesvisionyesfine tuningyes
knowledge_cutoff2024-05
taglineFastest, most cost-efficient version of GPT-4.1
tools["function_calling","file_search","image_generation","cod...
endpoints["chat_completions","responses","assistants","batch","fin...
gpt-4.1-nanocreate7f5c66fMar 21, 2026, 05:16 AM