GPT-5.3

Name: GPT-5.3
Author: OpenAI

基础大模型

GPT-5.3

Release date: 2026-02-20更新于: 2026-03-09 10:25:45823

Live demo

GPT-5.3 is an AI model published by OpenAI, released on 2026-02-20, for 基础大模型, with 0.0B parameters, and 1M tokens context length, under the 不开源 license.

Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology

GPT-5.3

Model basics

Reasoning traces

Supported

Thinking modes

Thinking Level · Medium (Default)Thinking Level · LowThinking Level · HighThinking Level · Extra-High

Context length

1M tokens

Max output length

No data

Model type

基础大模型

Release date

2026-02-20

Model file size

No data

MoE architecture

Total params / Active params

No data / N/A

Knowledge cutoff

No data

GPT-5.3

Open source & experience

Code license

不开源

Weights license

不开源- 不开源

GitHub repo

GitHub link unavailable

Hugging Face

Hugging Face link unavailable

Live demo

No live demo

GPT-5.3

Model Overview

OpenAI仅仅发布了GPT-5.3-Codex，未正式发布GPT-5.3，2026年3月6日直接发布了GPT-5.4模型

GPT-5.3

Model basics

Open source & experience

Official resources

API details

Benchmark Results

Publisher

Model Overview

DataLearner 官方微信