Cloud-based coding agent from OpenAI that runs in a sandboxed environment. Handles multi-file tasks, writes and runs tests, and integrates with GitHub. Available through ChatGPT and as an open-source CLI.
Pricing
ChatGPT Plus
$20/mo
flatCodex included, message limits per 5hrs
ChatGPT Pro
$200/mo
flatHighest priority, maximum message limits
ChatGPT Business
$30/mo
per-seatWorkspace credits, admin controls
Enterprise
Contact Sales
per-seatUnlimited high-speed access, SSO, advanced security
Models Used
| Model | Access Tier | Default |
|---|---|---|
| Codex Mini Latest | ChatGPT Plus | Default |
| o3 | ChatGPT Pro | |
| o4-mini | ChatGPT Plus | |
| GPT-4.1 | ChatGPT Plus |
Features
AutocompleteChatMulti-file EditAgent ModeTerminalCode ReviewGit IntegrationDeploy IntegrationLocal ModelsBYO API KeyMCP SupportOffline ModeIP IndemnitySSOOn-Prem
Platforms
WebCLI