In the CLI
Run /status in Codex. That is the live check for session and weekly windows. It is the right tool when you only need to know whether to start the next prompt.
It will not show last week, estimated cost across tools, or a chart. That is not what it is for.
On the desktop
- Download UsageAtlas for this computer.
- Let it use the signed-in Codex CLI already on the machine.
- Open Today for windows and remaining capacity. Open History for the trail.
If what you actually meant is model memory, that is how to check the Codex context window, which is a different number.
Questions, answered
How do I view Codex usage?
/status in the CLI for the current windows. UsageAtlas for remaining capacity, tokens, credits, and history on the desktop.
How do I check Codex usage without a dashboard?
Use /status in the Codex CLI.
Does UsageAtlas call the Codex API for this?
It uses the signed-in Codex CLI's local app-server API on this machine, not a UsageAtlas cloud account.