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What is GPT‑5.3‑Codex‑Spark?

GPT-5.3-Codex-Spark is a specialized, ultra-fast coding model designed to enable real-time collaboration within the Codex platform. As a streamlined variant of GPT-5.3-Codex, it prioritizes latency-sensitive workflows where immediate responsiveness is critical. When deployed on Cerebras’ Wafer Scale Engine 3 hardware, Codex-Spark delivers more than 1000 tokens per second, dramatically accelerating interactive development sessions. The model supports a 128k context window, allowing developers to maintain broad project awareness while iterating quickly. It is optimized for making minimal, precise edits and refining logic or interfaces without automatically executing additional steps unless instructed. OpenAI implemented extensive infrastructure upgrades—including persistent WebSocket connections and inference stack rewrites—to reduce time-to-first-token by 50% and cut client-server overhead by up to 80%. On software engineering benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0, Codex-Spark demonstrates strong capability while completing tasks in a fraction of the time required by larger models. During the research preview, usage is governed by separate rate limits and may be queued during peak demand. Codex-Spark is available to ChatGPT Pro users through the Codex app, CLI, and VS Code extension, with API access for select design partners. The model incorporates the same safety and preparedness evaluations as OpenAI’s mainline systems. This release signals a shift toward dual-mode coding systems that combine rapid interactive loops with delegated long-running tasks. By tightening the iteration cycle between idea and execution, GPT-5.3-Codex-Spark expands what developers can build in real time.

What is Beaker Notebook?

BeakerX is a versatile collection of kernels and extensions aimed at enhancing the Jupyter interactive computing experience. It supports JVM and Spark clusters, promotes polyglot programming, and features tools for crafting interactive visualizations like plots, tables, forms, and publishing options. The available APIs cover all JVM languages, along with Python and JavaScript, which enables the development of various interactive visualizations, including time-series graphs, scatter plots, histograms, heatmaps, and treemaps. A key highlight is that widgets retain their interactive nature whether the notebooks are stored locally or shared online, offering specialized tools for handling large datasets with nanosecond precision, zoom capabilities, and data export options. The table widget in BeakerX can effortlessly recognize pandas data frames, empowering users to search, sort, drag, filter, format, select, graph, hide, pin, and export data directly to CSV or the clipboard, thus enhancing integration with spreadsheets. Furthermore, BeakerX features a Spark magic interface that comes with graphical user interfaces for monitoring the configuration, status, and progress of Spark jobs, allowing users to either interact with the GUI or write code to initiate their own SparkSession. This adaptability positions BeakerX as an invaluable resource for data scientists and developers managing intricate datasets, providing them with the tools they need to explore and analyze data effectively. Ultimately, BeakerX fosters a more seamless and productive data analysis workflow, encouraging innovation in data-driven projects.

Media

Media

Integrations Supported

Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw

Integrations Supported

Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
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

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

Company Facts

Organization Name

Two Sigma Open Source

Company Website

BeakerNotebook.com

Categories and Features

Application Development

Access Controls/Permissions
Code Assistance
Code Refactoring
Collaboration Tools
Compatibility Testing
Data Modeling
Debugging
Deployment Management
Graphical User Interface
Mobile Development
No-Code
Reporting/Analytics
Software Development
Source Control
Testing Management
Version Control
Web App Development

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