GPT-5 nano

reasoningdeprecatedproprietary

Status: Deprecated · Succeeded by gpt-5.6-luna

Intelligence
Reasoning
Speed
Context
400K
Max output
128K
Input price
$0.05/1M tokens
Output price
$0.4/1M tokens
Snapshots

Capabilities

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

Details

Model IDgpt-5-nano
Provider OpenAI
Creator openai
Familygpt-5
Licenseproprietary
Statusdeprecated
Typereasoning
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window400K tokens
Max input272K tokens
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff
Release date
Deprecation date
Retirement date
Successorgpt-5.6-luna
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs
Web Searchweb_search
Search the web for information
File Searchfile_search
Search across uploaded files
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
BatchPOST
Async batch processing at lower costhttps://api.openai.com/v1/batches

Pricing

Text tokensPer 1M tokens
InputCached inputOutput
Standard$0.05$0.005$0.4

Family Comparison: gpt-5

ModelContextMax outPricing
GPT-5 nano400K128K$0.05$0.4
GPT-5 Mini400K128K$0.25$2
GPT-5 Chat128K16K$1.25$10
GPT-5-Codex400K128K$1.25$10
gpt-5-latest——$1.25$10
GPT-5400K128K$1.25$10
GPT-5 Pro400K272K$15$120

API

GET/v1/models/openai/gpt-5-nano

GPT-5 nano

deprecated
gpt-5-nano

Status: Deprecated

gpt-5-nano-2025-08-07
Changes · 12 entries
gpt-5-nanoupdateca7a400Nov 2, 2026, 03:02 AM
descriptionGPT-5 Nano is our fastest, cheapest version of GPT-5. It'...→Status: Deprecated
statusactive→deprecated
model_typechat→reasoning
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
tools["function_calling"]→["function_calling","web_search","file_search","code_inte...
page_urlhttps://developers.openai.com/api/docs/models/gpt-5-nano?...→https://developers.openai.com/api/docs/models/gpt-5-nano
deprecation_date2026-06-11
retirement_date2026-12-11
successorgpt-5.6-luna
gpt-5-nanoupdateb2f45bfOct 29, 2026, 03:29 AM
descriptionGPT-5 Nano is our fastest, cheapest version of GPT-5. It'...→Status: Deprecated
tools["function_calling","web_search","file_search","image_gen...→["function_calling","web_search","file_search","code_inte...
gpt-5-nanoupdate4e8b6afOct 21, 2026, 06:35 AM
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
gpt-5-nanoupdatecfa51b9Sep 24, 2026, 09:28 AM
statusactive→deprecated
deprecation_date2026-06-11
retirement_date2026-12-11
successorgpt-5.6-luna
gpt-5-nanoupdate118451aSep 24, 2026, 07:08 AM
descriptionGPT-5 Nano is our fastest, cheapest version of GPT-5. It'...→GPT-5 Nano is our fastest, cheapest version of GPT-5. It'...
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
gpt-5-nanoupdateab879c8Jun 18, 2026, 08:32 AM
model_typechat→reasoning
tools["function_calling"]→["function_calling","web_search","file_search","image_gen...
page_urlhttps://developers.openai.com/api/docs/models/gpt-5-nano?...→https://developers.openai.com/api/docs/models/gpt-5-nano
gpt-5-nanoupdatefa2bbbbMar 24, 2026, 05:22 AM
capabilitiesjson modeno→yes
gpt-5-nanoupdatef43e286Mar 24, 2026, 04:45 AM
capabilitiesjson modeyes→nofine tuningnobatchyes
gpt-5-nanoupdate1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
page_urlhttps://platform.openai.com/docs/models/gpt-5-nano→https://developers.openai.com/api/docs/models/gpt-5-nano?...
gpt-5-nanoupdate2b100acMar 23, 2026, 05:30 AM
model_typereasoning→chat
tools["function_calling","web_search","file_search","image_gen...→["function_calling"]
licenseproprietary
page_urlhttps://platform.openai.com/docs/models/gpt-5-nano
open_weightno
release_date2025-08-07
gpt-5-nanoupdateb50649fMar 21, 2026, 11:58 PM
namegpt-5-nano→GPT-5 nano
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
capabilitiesstreamingyesvisionyes
knowledge_cutoff2024-05
max_input_tokens272000
reasoning_tokensyes
reasoning2
taglineFastest, most cost-efficient version of GPT-5
tools["function_calling","web_search","file_search","image_gen...
endpoints["chat_completions","responses","batch"]
gpt-5-nanocreate7f5c66fMar 21, 2026, 05:16 AM