OpenAI Codex
Develops AI systems for solving complex problems.
What is OpenAI Codex?
OpenAI Codex is a Code Generation tool that develops AI systems for solving complex problems. OpenAI Codex is freemium: it has a free plan plus paid upgrades. It is aimed at developers, businesses and productivity teams.
OpenAI focuses on research and deployment of AI systems. It aims to create artificial general intelligence capable of addressing human-level challenges.
Built for developers, businesses and productivity teams.
Key capabilities
Features
Code Writing
Writes code in isolated sandboxes.
Pull Request Automation
Parallel Task Execution
Runs tasks in parallel.
Public API
Provides access to a public API.
ISO Certification
Compliant with ISO 27001, 27017, 27018, and 27701 standards.
SAML SSO
Data Encryption
Encrypts data in transit using TLS 1.2.
Use cases
- Write code in isolated sandboxes
- Run tasks in parallel
- Access public API
- Use free plan
- Access enterprise pricing
Popular use cases
Who it's for
Pros & cons
Pros
- Public API available
- Free plan available
- Custom and enterprise pricing available
Cons
No documented limitations yet.
Pricing
Freemium.
| Plan | Price |
|---|---|
| Free | Free |
| Essentials | Free |
| Developer mode (beta) | Free |
| Basic user analytics | Free |
| Enterprise Key Management | Free |
| Custom security review | Free |
AI models
- DALL-E
- GPT 5
Developer & API
Public SDK API available
Security & compliance
- ISO 27001
- SSO
- SAML
- Encryption
As stated on OpenAI Codex's website — not independently verified by AiByts.
FAQ
What is OpenAI Codex?
OpenAI Codex is a Code Generation tool that develops AI systems for solving complex problems. OpenAI focuses on research and deployment of AI systems. It aims to create artificial general intelligence capable of addressing human-level challenges.
Is OpenAI Codex free?
OpenAI Codex has a free plan; advanced features require a paid plan.
How much does OpenAI Codex cost?
OpenAI Codex offers 6 plans: Free (Free), Essentials (Free), Developer mode (beta) (Free), Basic user analytics (Free), Enterprise Key Management (Free) and Custom security review (Free).
Does OpenAI Codex have an API?
Yes, OpenAI Codex offers a public SDK API for building custom integrations.
Who should use OpenAI Codex?
OpenAI Codex is built for developers, businesses and productivity teams. Common uses: write code in isolated sandboxes, run tasks in parallel, access public API and use free plan.
What are the best alternatives to OpenAI Codex?
Similar tools on AiByts include Runcell, Zentask, Kilo Code, Antigravity CLI and GitHub Copilot.
OpenAI Codex news & updates
The EU’s next chapter in AI is agentic
New analysis shows how agentic AI adoption is growing across EU enterprises and small businesses—and where deeper use could unlock more value.
OpenAI News2 min read
Higgsfield takes AI video from 1 minute to over 10
Higgsfield brings creators longer videos with GPT-6 Astra, precise visuals with GPT-Image-2.5, and a path to voice filmmaking with GPT-Live.
OpenAI News3 min read
Sophos cuts threat investigation time by 96% with OpenAI Daybreak
Discover how Sophos uses OpenAI’s Daybreak to cut cyber-threat investigation time by 96% and automate 52% of MDR cases while preserving human oversight.
OpenAI News4 min read
Asana cuts model costs 76x in browser tests with GPT-6.1 Sol
Using GPT-6 Astra in Codex, Asana made its browser agent 76x cheaper and 5x faster in tests to offer customers more capable models.
OpenAI News6 min read
How Oracle turns days of work into minutes with ChatGPT and Codex
Across recruiting, engineering, and operations, Oracle turns specialist knowledge into fast, repeatable workflows with ChatGPT Work and Codex.
OpenAI News4 min read
Pollo AI turns creative ideas into campaigns with OpenAI
With GPT-5.6, GPT-6 Astra, and GPT‑Image‑2.5, Pollo AI helps creators turn bold ideas into detailed images and cinematic video ads.
OpenAI News5 min read
LegalOn halves Codex costs while maintaining development speed
LegalOn cut estimated daily Codex costs by 65% while maintaining development speed. It matched Astra, Sol, and Luna to tasks and managed budgets strategically.
OpenAI News6 min read
Disrupting AI-enabled “false front” operations
OpenAI disrupted two AI-enabled influence operations that used false-front journalists and a think tank to spread geopolitical messaging.
OpenAI News23 min read
Helping teens learn, plan, and shape the future of AI
College Planner is coming to ChatGPT for Teens to help students manage college applications, alongside new flashcards, quizzes, and a teen AI council.
OpenAI News6 min readAtlassian and OpenAI expand partnership to turn enterprise knowledge into action
Atlassian and OpenAI are expanding their partnership to connect frontier models with enterprise knowledge and help teams plan, build, and deliver work.
OpenAI News1 min read
How Jump Trading is scaling quant research with ChatGPT
Jump Trading uses OpenAI to expand quantitative research. See how longer-running AI workflows combine multiple data sources with human review.
OpenAI News5 min read
Advancing computer use with Ironclad
Learn how OpenAI and Ironclad are training and evaluating AI agents on complex contracting workflows to advance computer use for professional work.
OpenAI News6 min read
Our approach to EU text provenance rules
How OpenAI is approaching text watermarking under EU rules. Learn where watermarks apply, how detection works, and why access starts with researchers.
OpenAI News6 min read
Building advertising for the way people use AI
OpenAI introduces a new visual ad format in ChatGPT and expands measurement tools, attribution partnerships, and brand suitability for advertisers.
OpenAI News5 min read
A model guide for the GPT-6 family
Learn how startups can choose GPT-6 models, tune reasoning effort, improve prompts and skills, coordinate tools, and prepare workflows for production.
OpenAI News8 min read
Chatham scales its capital markets expertise with OpenAI
Chatham Financial uses Codex and GPT-5.6 to build technology and redesign workflows, cutting trade validation from 30 minutes to under 4.
OpenAI News4 min read
The eternal complement
Advanced AI may matter most for the routine work behind breakthrough ideas. Explore why execution could shape the next economy and the pace of progress.
OpenAI News13 min read
How Albertsons Companies is reimagining retail from the inside out
Albertsons Cos. is using ChatGPT Enterprise and the OpenAI API to help teams work faster and make grocery shopping easier for millions of customers.
OpenAI News3 min read
Details are compiled from OpenAI Codex's website and public sources, last verified Oct 3, 2026. Features and pricing change — confirm on the official site before you buy.
Try OpenAI Codex
Freemium
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