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What is Reactor?

Reactor is in the process of creating a vital layer for world models and is encouraging users to participate in an early preview featuring real-time world models. Central to its product vision is the capability to generate worlds instantaneously, facilitating the immediate creation of visuals, sounds, and actions, which revolutionizes the way users engage with both digital applications and the physical world. This early preview signifies the onset of a groundbreaking chapter, allowing users to delve into AI-crafted environments supported by a global, low-latency network. Reactor is committed to leading the charge in the next generation of AI, concentrating on real-time world models that can be traversed by individuals, automated agents, and robots in a frame-by-frame fashion. Rather than simply offering generated videos as a static viewing option, Reactor aspires to create interactive environments that users can inhabit, alter, and shape in real time. The focus of the research and product development is on enabling real-time interactions, inference, customizable world models, and systems that respond dynamically to create visually engaging settings suitable for live participation, thus setting the stage for a more immersive and engaging experience. This pioneering methodology seeks to blur the lines of digital interaction, intertwining imagination with advanced technological capabilities, and it promises to usher in a new standard of engagement in virtual spaces. Ultimately, this innovation not only enhances user experience but also invites a collaborative approach to the creation and exploration of digital landscapes.

What is GPT-5.3-Codex?

GPT-5.3-Codex represents a major leap in agentic AI for software and knowledge work. It is designed to reason, build, and execute tasks across an entire computer-based workflow. The model combines the strongest coding performance of the Codex line with professional reasoning capabilities. GPT-5.3-Codex can handle long-running projects involving tools, terminals, and research. Users can interact with it continuously, guiding decisions as work progresses. It excels in real-world software engineering, frontend development, and infrastructure tasks. The model also supports non-coding work such as documentation, data analysis, presentations, and planning. Its improved intent understanding produces more complete and polished outputs by default. GPT-5.3-Codex was used internally to help train and deploy itself, accelerating its own development. It demonstrates strong performance across benchmarks measuring agentic and real-world skills. Advanced security safeguards support responsible deployment in sensitive domains. GPT-5.3-Codex moves Codex closer to a general-purpose digital collaborator.

Media

Media

Integrations Supported

Buda
C
ChatGPT Enterprise
ChatGPT Plus
Codex CLI
Codex Security
Elixir
F#
GitHub
GitHub Copilot
Go
Java
Julia
Kotlin
Laravel
OpenAI Codex
PrivatClaw
R
Ruby
Visual Studio Code

Integrations Supported

Buda
C
ChatGPT Enterprise
ChatGPT Plus
Codex CLI
Codex Security
Elixir
F#
GitHub
GitHub Copilot
Go
Java
Julia
Kotlin
Laravel
OpenAI Codex
PrivatClaw
R
Ruby
Visual Studio Code

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Reactor

Date Founded

2021

Company Location

United States

Company Website

www.reactor.inc/

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

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