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About

GPT-5.3-Codex-Spark is an ultra-fast coding model designed for real-time collaboration inside Codex. Built as a smaller version of GPT-5.3-Codex, it delivers over 1000 tokens per second when served on low-latency Cerebras hardware. The model is optimized for interactive coding tasks, enabling developers to make targeted edits and see results almost instantly. With a 128k context window, Codex-Spark supports substantial project context while maintaining speed. It focuses on lightweight, precise edits and does not automatically run tests unless prompted. Infrastructure upgrades such as persistent WebSocket connections significantly reduce latency across the full request-response pipeline. Released as a research preview for ChatGPT Pro users, Codex-Spark marks the first milestone in OpenAI’s partnership with Cerebras.

About

SparkBuilt helps founders escape blank canvas paralysis. It automates the first two weeks of dev so you can turn ideas into deployable web apps in few minutes. It generates full stack code (React, Vite, Tailwind, Convex, Clerk), AI pitch slides, market analysis, and a ready tech stack you can export to GitHub. Perfect for workers validating ideas, founders pitching fast, hackathon teams, and students. Stop stitching together fragmented tools. Most founders burn runway paying for separate UI builders, deck generators, and research tools before they even launch. SparkBuilt is the first Unified Venture Engine that builds your Product (Full-Stack MVP), Narrative (Investor Deck), and Strategy (Market Research) simultaneously from a single shared context. True Ownership, No Lock-In. We don't hold your code hostage. Unlike "walled garden" builders, SparkBuilt lets you Export to GitHub or Deploy to your own Vercel account instantly. You own the code, the keys, and the IP from Day 1.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Software developers, engineering teams, and AI-powered coding tool builders seeking ultra-low-latency, real-time code generation and iterative collaboration within the Codex ecosystem

Audience

Early-stage founders, students, anyone

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$49
Launch promo (standard price - $199)
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

SparkBuilt
Founded: 2025
United States
sparkbuilt.dev

Alternatives

Claude Opus 4.5

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Anthropic

Alternatives

DormantGems

DormantGems

SuperFolders
Claude Opus 4.6

Claude Opus 4.6

Anthropic
InteractPitch

InteractPitch

Interact AI

Categories

Categories

Integrations

Codex CLI
Codex Security
Convex
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw

Integrations

Codex CLI
Codex Security
Convex
Microsoft Foundry
OpenAI
OpenAI Codex
OpenClaw
Claim GPT‑5.3‑Codex‑Spark and update features and information
Claim GPT‑5.3‑Codex‑Spark and update features and information
Claim SparkBuilt and update features and information
Claim SparkBuilt and update features and information