Codex CLI

Terminal agentEditor extensionCloud agent

OpenAI's open source terminal agent. Signs in with a ChatGPT account and shares the plan's usage window, or bills an API key at token prices.

OpenAIFree tier2026-08-23

Pricing

Included with ChatGPT plans.

Plan	Price	Included	Beyond that	Notes
ChatGPT Free individual	Free	—	Rate limited until reset	Small allowance for quick tasks, shared with ChatGPT
ChatGPT Go individual	$8/mo per user	—	Rate limited until reset	—
ChatGPT Plus individual	$20/mo per user	—	Rate limited until reset	Roughly 10 to 100 messages per five-hour window depending on the model
ChatGPT Pro individual	From $100/mo per user	—	Rate limited until reset	5x or 20x the Plus allowance depending on the Pro tier
ChatGPT Business team	$20/mo per user	—	Rate limited until reset	Billed annually, two seats minimum.
API key individual	Usage-based	—	API list price Pay for the tokens Codex uses at API prices. Cloud features are not included.	—

Codex and ChatGPT share one five-hour usage window per plan.

Source: learn.chatgpt.com/docs/pricing Pricing verified 2026-08-23

What Codex CLI runs, and what can run Codex CLI. "With your existing login" means the wrapped tool's subscription is reused, no second bill.

OpenAIBYOK

OpenAI models only. Local models through an OpenAI-compatible endpoint are configurable but unsupported.

Git worktreesSubagentsMCP clientACP agentSandboxingPluginsHooks

Apache-2.0 · Open source · github.com/openai/codex

Every fact above points at a vendor page and the date someone last checked it.