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OpenAI: GPT-5.2 Chat

Source description (English)

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...

Overview

Model specifications

Context
128,000 tokens
Maximum output
32,000 tokens
Architecture
text+image+file->text
Tokenizer
GPT
Knowledge cutoff
Not provided
Moderated
No
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$1.75
per 1M tokens
Output
$14
per 1M tokens
Cache read
$0.175
per 1M tokens
API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5.2-chat","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
fileimagetext
Output
text
API

Supported API parameters

max_completion_tokensresponse_formatseedstructured_outputstool_choicetoolsverbosity
Available providers

1 Provider

Checked: October 2, 2026

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

Azure

Not provided
Context
128K
Maximum output
32K
Input
$1.75
Output
$14
Cache read
$0.175
Cache write
Not provided
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