Model dossier

OpenAI: GPT-5.3 Chat

GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...

ProviderOpenAI Start comparison

Context128,000

Max output16,384

Pricing viewTVP price

Identity

OpenAI: GPT-5.3 Chat

Model ID: openai/gpt-5.3-chat
Canonical slug: openai/gpt-5.3-chat-20260303
Knowledge cutoff: n/a
Created: 3/3/2026

Capabilities

textimagefiletoolsstructured

Modalities

text+image+file->texttextimagefile

Capacity

Context128,000

Max output16,384

TokenizerGPT