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Average Ratings 0 Ratings
Description
GPT-5.3-Codex-Spark is OpenAI’s first model purpose-built for real-time coding within the Codex ecosystem. Engineered for ultra-low latency, it can generate more than 1000 tokens per second when running on Cerebras’ Wafer Scale Engine hardware. Unlike larger frontier models designed for long-running autonomous tasks, Codex-Spark specializes in rapid iteration, targeted edits, and immediate feedback loops. Developers can interrupt, redirect, and refine outputs interactively, making it ideal for collaborative coding sessions. The model features a 128k context window and is currently text-only during its research preview phase. End-to-end latency improvements—including WebSocket streaming and inference stack optimizations—reduce time-to-first-token by 50% and overall roundtrip overhead by up to 80%. Codex-Spark performs strongly on benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0 while completing tasks significantly faster than its larger counterpart. It is available to ChatGPT Pro users in the Codex app, CLI, and VS Code extension with separate rate limits during preview. The model maintains OpenAI’s standard safety training and evaluation protocols. Codex-Spark represents the beginning of a dual-mode Codex future that blends real-time interaction with long-horizon reasoning capabilities.
Description
GPT-5-Codex is an enhanced iteration of GPT-5 specifically tailored for agentic coding within Codex, targeting practical software engineering activities such as constructing complete projects from the ground up, incorporating features and tests, debugging, executing large-scale refactors, and performing code reviews. The latest version of Codex operates with greater speed and reliability, delivering improved real-time performance across diverse development environments, including terminal/CLI, IDE extensions, web platforms, GitHub, and even mobile applications. For cloud-related tasks and code evaluations, GPT-5-Codex is set as the default model; however, developers have the option to utilize it locally through Codex CLI or IDE extensions. It intelligently varies the amount of “reasoning time” it dedicates based on the complexity of the task at hand, ensuring quick responses for small, clearly defined tasks while dedicating more effort to intricate ones like refactors and substantial feature implementations. Additionally, the enhanced code review capabilities help in identifying critical bugs prior to deployment, making the software development process more robust and reliable. With these advancements, developers can expect a more efficient workflow, ultimately leading to higher-quality software outcomes.
API Access
Has API
Yes
API Access
Has API
Yes
Integrations
Codex CLI
Yes
Codex Security
Yes
Microsoft Foundry
Yes
OpenAI Codex
Yes
C
No
C#
No
ChatGPT Enterprise
No
F#
No
GitHub
No
Go
No
Integrations
Codex CLI
Yes
Codex Security
Yes
Microsoft Foundry
Yes
OpenAI Codex
Yes
C
Yes
C#
Yes
ChatGPT Enterprise
Yes
F#
Yes
GitHub
Yes
Go
Yes
Pricing Details
No price information available.
Free Trial
No
Free Version
No
Pricing Details
No price information available.
Free Trial
No
Free Version
Yes
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Customer Support
Business Hours
No
Live Rep (24/7)
No
Online Support
Yes
Customer Support
Business Hours
No
Live Rep (24/7)
No
Online Support
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Vendor Details
Company Name
OpenAI
Founded
2015
Country
United States
Website
openai.com
Vendor Details
Company Name
OpenAI
Founded
2015
Country
United States
Website
openai.com/index/introducing-upgrades-to-codex/