Model dossier

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...

ProviderOpenAI Start comparison

Context128,000

Max output32,000

Pricing viewTVP price

Identity

OpenAI: GPT-5.1 Chat

Model ID: openai/gpt-5.1-chat
Canonical slug: openai/gpt-5.1-chat-20251113
Knowledge cutoff: n/a
Created: 11/13/2025

Capabilities

fileimagetexttoolsstructured

Modalities

text+image+file->textfileimagetext

Capacity

Context128,000

Max output32,000

TokenizerGPT