All Models

GPT-5.3 Chat

Reasoning Tool Calling Attachments Structured Output

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 reduces unnecessary refusals, caveats, and overly cautious phrasing that can interrupt conversational flow.

Providers 3
Released Mar 3, 2026
Input Modalities text, image, pdf
Output Modalities text
Tarsk Use coding

Available Providers (3)

Provider Model ID Input Cost Output Cost Context Max Output Docs
ZenMux openai/gpt-5.3-chat $1.75/MTok $14.00/MTok 128K 16.4K
Vercel AI Gateway openai/gpt-5.3-chat $1.75/MTok $14.00/MTok 128K 16.4K
Azure gpt-5.3-chat $1.75/MTok $14.00/MTok 128K 16.4K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output