Discover OpenAI's GPT-5.3 Chat Model

Experience smoother and more helpful conversations with GPT-5.3 Chat.

Input: text · image · file Output: text Context: 128,000 tokens Release: 2026-03-03

OpenAI's GPT-5.3 Chat, released on March 3, 2026, is designed to improve everyday conversations by providing more accurate answers and better contextualization. With a context length of 128,000 tokens, this model supports multiple input modalities including text, images, and files, while delivering output primarily in text format. Key features include reduced refusals and a smoother conversational flow, making it a valuable tool for various applications. Whether you're looking to enhance customer interactions or streamline communication, GPT-5.3 Chat offers a more direct and helpful approach to dialogue.

Use Cases

Here are a few ways teams apply OpenAI: GPT-5.3 Chat in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Enhance customer service interactions

Streamline team communication

Facilitate engaging educational dialogues

Support content creation and brainstorming

Assist in data interpretation from various formats

Key Features

A quick look at the capabilities that make this model useful in real projects.

Context length of 128,000 tokens

Handles text, image, and file inputs

Delivers text-based responses

Reduces unnecessary refusals

Improves conversational flow

Supports multiple output modalities

Specs

Overview

Vendor
openai

Model ID
openai/gpt-5.3-chat

Release
2026-03-03

Modalities & context

Input
text · image · file

Output
text

Context
128,000 tokens

Parameters & defaults

Supported parameters: max_tokens, response_format, seed, structured_outputs, tool_choice, tools

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: OpenAI: GPT-5.3 Chat

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

Artificial intelligence could positively upend work, leisure, and creativity by shifting humans away from routine effort toward more meaningful activities. In work, AI can automate repetitive tasks such as data entry, scheduling, and basic analysis, allowing people to focus on strategy, problem‑solving, and human-centered roles. This may shorten workweeks and improve productivity while reducing burnout. In leisure, AI could give people more free time and richer experiences. Personalized learning, travel planning, gaming, and entertainment systems may adapt to individual interests, making free time more engaging and accessible. People might also use AI tools to learn new skills quickly, from languages to music. Creativity may expand as AI becomes a collaborative partner. Writers, designers, musicians, and filmmakers can use AI to generate ideas, experiment with styles, and speed up production. Rather than replacing human imagination, AI can amplify it, helping more people create, explore, and share their ideas with the world.

Run this prompt on Upend.AI

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up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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