lab · San Francisco · est. 2015
OpenAI
OpenAI's Codex CLI is Apache-2.0 at the shell and commercially licensed at the hosted runtime. The lab co-adopted Agent Skills in late 2025, which is why Codex plugins resolve against the same registry graph as Claude Skills.
Kind mix
Listings
Harness
Codex CLI
Apache-2.0 shell, commercial hosted runtime. Second native Skills consumer.
142,800
Harness
ChatGPT Codex
Hosted Codex runtime. CLI is Apache; this is the bill.
96,000
Harness
Codex Desktop
macOS/Windows app for parallel Codex agents and worktrees. Linux gets the CLI.
22,000
Advance
OpenAI Agents SDK
Python SDK for agent loops. Not a hosted harness.
19,000
MCP
OpenAI MCP
Hosted tools and connectors on the OpenAI side. ChatGPT Workspace is not a public catalog.
18,000
MCP
Codex MCP
Codex CLI as an MCP client. Apache at the shell.
16,000
Advance
Operator
OpenAI's computer-use agent. Browser in their VM, not yours.
14,000
Advance
Swarm
The experimental handoff kit. Agents SDK is the successor.
8,600