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features
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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

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/

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