OpenAI Codex (cloud) · OpenAI
OpenAI's delegation-first coding agent whose cloud mode runs each task in an isolated no-internet-by-default sandbox with the repo cloned, opens PRs, does automatic PR code review on GitHub and takes tasks from ChatGPT/Slack, bundled into ChatGPT Plus/Pro/Business with rolling credit-based billing since April 2026 (the CLI companion is open source, the cloud service is not).
Identity
| Homepage | https://developers.openai.com/codex |
|---|---|
| Repository | https://github.com/openai/codex |
| License | proprietary |
| Domain | coding |
| Form factor | cloud-service · web-app · cli · ide-extension · chat-integration |
Model support
| Model-agnostic | ○ no |
|---|---|
| Native models | GPT-5-Codex · GPT-5.5 |
| Local models | ○ no |
| Pricing | subscription |
Extensibility
| MCP client | ✓ yes |
|---|---|
| Agent Skills support | ? unknown |
| Plugins / hooks | ? unknown |
Execution & safety
| Sandboxing | container |
|---|---|
| Autonomy spectrum | background-cloud → autonomous-local → semi-autonomous → supervised |
| Subagents | ? unknown |
| Parallel sessions | ✓ yes |
| Context management | compaction |
Integration & evidence
| Headless / API | ✓ yes |
|---|---|
| GitHub integration | ✓ yes |
| Sources |
✓ profile last verified 2026-07-08 · benchmark figures are vendor-reported unless a source states otherwise