OpenAIOfficial

OpenAI: GPT-5.1 Chat

GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...

Pricing

Input

$1.25/1M tokens

Output

$10.00/1M tokens

Cache Read

$0.125/1M tokens

Capabilities

Context Window128K tokens

Max Output16K tokens

SpeedMedium

Release2025-11

Vision

Tool Use

API Access

Local / Open

API Access

Official API

Official Links

Official Website

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