GPT-5.2 Chat
by OpenAItext+image+file->text1 endpoint
Overview
GPT-5.2 Chat (AKA Instant) is the fast, lightweight member of the 5.2 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
Capabilities
Text generation
Image understanding
Tool use / Function calling
Structured output
Prompt caching
Long context
File input
Deterministic seed
Modalities
Input
FileImageText
Output
Text
Technical Specifications
Context Window
128K tokens
Max Output
32K tokens
Tokenizer
GPT
Supported Parameters
max_completion_tokensresponse_formatseedstructured_outputstool_choicetools
Pricing
Per 1M tokens
Input$1.75
Output$14.00
Cache read$0.17
Added
December 10, 2025
Last synced 9/19/2026