gpt-4.5-preview-2025-02-27

deprecatedproprietary

Deprecated - a research preview of GPT-4.5. We recommend using gpt-4.1 or o3

Intelligence
Speed
Context
128K
Max output
16K
Input price
$75/1M tokens
Output price
$150/1M tokens
Alias ofgpt-4.5-preview

Capabilities

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

Details

Provider OpenAI
Creator openai
Familygpt-4.5
Licenseproprietary
Statusdeprecated
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window128K tokens
Max input—
Max output16K tokens
Reasoning tokens—
Knowledge cutoff
Release date
Deprecation date
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
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$75$37.5$150

API

GET/v1/models/openai/gpt-4.5-preview-2025-02-27