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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
Keelen operates as an independent coding loop designed to transform open-ended requests into a structured and prioritized roadmap. It then subdivides items from this roadmap into development-ready tasks complete with acceptance criteria, executing each task in a secure, isolated VM environment using your designated credentials from Claude, Codex, GLM, or Kimi, ultimately producing a merged pull request or retaining it for review based on your settings.
Every modification undergoes a series of five verification checkpoints prior to merging: an initial red-first test proof, a separate adversarial review of the changes by a model that lacks context from the preceding run, the execution of the project’s own test suite on a fresh checkout, a CI-green mandate, and a designated review period before automated merging is allowed. Importantly, the process is structured to ensure that no checks are compromised to achieve a green status.
Each iteration is conducted in a temporary, non-root VM that is eliminated at the conclusion of the run, featuring a deny-by-default policy on network access. Additionally, the GitHub tokens utilized for each run are limited in scope to a single repository.
It's essential to note that Keelen does not function as an IDE copilot nor as a chat interface; its capabilities are distinctly designed to automate and streamline the coding workflow.
API Access
Has API
API Access
Has API
Screenshots View All
No images available
Integrations
Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw
Integrations
Codex CLI
Codex Security
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw
Pricing Details
No price information available.
Free Trial
Free Version
Pricing Details
$29/month
Free Trial
Free Version
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Deployment
Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Customer Support
Business Hours
Live Rep (24/7)
Online Support
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Types of Training
Training Docs
Webinars
Live Training (Online)
In Person
Vendor Details
Company Name
OpenAI
Founded
2015
Country
United States
Website
openai.com
Vendor Details
Company Name
Keelen
Founded
2026
Country
United States
Website
keelen.ai/
Product Features
Product Features
Alternatives
Alternatives
No Alternatives