Chat Latest

proprietary

chat-latest points to the latest Instant model currently used in ChatGPT. We recommend leveraging GPT-6 Astra for production API usage. Learn more on the Model guidance page. The underlying model snapshot will be regularly updated.

Intelligence
Speed
Context
400K
Max output
128K
Input price
$5/1M tokens
Output price
$30/1M tokens

Capabilities

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

Details

Model IDchat-latest
Provider OpenAI
Creator openai
Family—
Licenseproprietary
Statusactive
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window400K tokens
Max input272K tokens
Max output128K tokens
Reasoning tokens—
Knowledge cutoff
Release date—
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
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

Pricing

Text tokensPer 1M tokens
InputCached inputOutput
Standard$5$0.5$30

API

GET/v1/models/openai/chat-latest

Chat Latest

chat-latest

chat-latest points to the latest Instant model currently used in ChatGPT. We recommend leveraging GPT-6 Astra for production API usage. Learn more on the Model guidance page. The underlying model snapshot will be regularly updated.

chat-latest
Changes · 5 entries
chat-latestupdateca7a400Nov 2, 2026, 03:02 AM
namechat-latest→Chat Latest
descriptionchat-latest points to the latest Instant model currently ...→chat-latest points to the latest Instant model currently ...
knowledge_cutoff2025-08→2026-04
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
endpoints["responses","chat_completions"]→["chat_completions","responses"]
chat-latestupdatedcc4383Oct 11, 2026, 06:38 AM
knowledge_cutoff2025-08→2026-04
chat-latestupdate118451aSep 24, 2026, 07:08 AM
descriptionchat-latest points to the latest Instant model currently ...→chat-latest points to the latest Instant model currently ...
pricingtiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
endpoints["responses","chat_completions"]→["chat_completions","responses"]
chat-latestupdate80c574aJun 3, 2026, 07:05 AM
namechat-latest→Chat Latest
chat-latestcreate241c61aMay 7, 2026, 04:28 AM