OpenAI: GPT-5.2 Chat

openai/gpt-5.2-chat · OpenAIUnmeasurable

Declared family: GPT
Declared tokenizer tag: GPT
Entered catalogue: 10 December 2025
Measurement: Unavailable: the endpoint did not answer
Evidence confidence: Unknown

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Not measured yet	we measured it
How its API is set up	A combination of settings no other listing in the catalogue uses	api_62e9d53d
How much it can read and write	Reads up to 128,000 tokens at once, writes up to 32,000	its own listing

Declared record

What the catalogue claims about this model

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...

Modalities: text+image+file->text
Declared tokenizer: GPT
Prompt price: $1.75 / M tokens
Completion price: $14.0 / M tokens

Supported parameters

max_completion_tokensresponse_formatseedstructured_outputstool_choicetoolsverbosity

defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}

Catalogue entry

History

Every observation, kept as taken

10 December 2025Enters the OpenRouter catalogue declared as GPT.