Built for >
 

Unleash Codex's raw power directly in your editor and terminal. Search million-line codebases instantly. Turn hours-long workflows into a single command. Your tools. Your workflow. Your codebase, evolving at thought speed.

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Core Capabilities

Everything Codex does is built to feel like a natural extension of your editor and shell.

Built for reasoning

Codex keeps a mental model of your entire codebase, so questions like 'how does auth work?' have concrete answers.

Built for persistence

Codex remembers decisions, branches, and tradeoffs across sessions so you don't have to repeat yourself.

Built for tooling

Runs tests, linters, and scripts through your existing CLI. No black-box CI required to see if something passes.

Used By

Trusted by employees of leading companies and teams worldwide.

System Architecture

Engineered for Reliability.

Codex processes every request through a deterministic pipeline that analyzes context, hydrates state from your repository, and executes tools in a controlled sequence. Each stage is isolated and testable, ensuring consistent behavior across environments.

01

Input Analysis

Parse and validate user commands, extract intent and context from natural language.

02

State Hydration

Load repository state, read relevant files, and build a working model of the codebase.

03

Tool Execution

Execute planned changes through isolated tool runners with rollback capabilities.

CLI InputOrchestratorState GraphGemini APITools(MCP)Postgres DB

Simple pricing for serious builders.

All plans are free while Codex is in preview. Choose the plan that fits your workflow.

Popular

Starter

Perfect for individuals exploring Codex on personal projects.

Freeforever
  • Up to 3 private workspaces
  • Unlimited public repos
  • CLI + editor integration
  • Community support
Recommended

Developer

For developers who want Codex involved in every workflow.

Freeforever
  • Up to 10 workspaces
  • Shared context across repos
  • Priority latency
  • Advanced tooling access
  • Email support

Team

For teams who want Codex involved in every PR and deployment.

Freeforever
  • Unlimited workspaces
  • Team collaboration features
  • Shared knowledge base
  • Custom integrations
  • Priority support

One window, one buffer, one brain. No dashboards, no tabs — just you, your repo, and Codex quietly doing the heavy lifting.