Codex vs Claude Code: usage limits compared
If you code with both, the question is rarely "which is better" — it's "which one still has room right now." Codex and Claude Code limit usage in strikingly similar ways, but on separate clocks you have to track separately. Here's how they compare, and the fastest way to keep both in view.
They meter usage the same way
The two agents arrived at almost the same rate-limit model. Both are metered on a rolling window of a few hours with a weekly cap layered on top, and both tie that budget to the subscription you're already signed into — Codex to your ChatGPT plan, Claude Code to your Claude plan — not to a separate API key. Every prompt counts, and so does the autonomous work the agent does on your behalf, so a couple of long runs move the needle far more than a morning of small edits.
The practical consequence is the same for both: the limit shows up mid-task, and the CLI only warns you once you're already near the edge.
Codex vs Claude Code, side by side
How the budget is set
Both scale with your plan tier — a higher subscription buys more headroom on each. Because both providers revise their caps over time, the honest way to compare is by the window that's tightest right now, not by a fixed number that may be out of date by the time you hit it.
How you check it
Each CLI answers /usage for an account-level view and
/status for the current session. Identical ergonomics,
identical catch: it's one command, in one tool, in one session —
and you have to remember to ask, every time.
How the windows reset
The rolling window on each refills a few hours after you start using it, on its own schedule rather than a fixed clock; the weekly cap refills on a longer cycle. Two independent countdowns per tool, four in total once you run both.
Which one gives you more room
The honest answer
Whichever one you haven't spent yet. Their budgets are separate, so "more room" is a live question, not a spec-sheet one.
People reach for a comparison table hoping one agent is simply more generous. In practice the tiers move, the workloads differ, and the number that actually matters is how much of this window is left on each — which flips through the day. The developers who never get blocked aren't the ones who picked the "bigger" plan; they're the ones who can see both budgets at a glance and send the next big run to whichever has room.
The effortless way: watch both at once
Vibe Island reads your existing Codex and Claude Code logins and shows their live windows together in your Mac's notch — the percentage used and the time until reset, for each rolling window and weekly cap. No command, no browser tab, no API key. Start a long run on one, glance up, and the answer to "do I still have room, and where?" is already at the top of your screen.
Using both, and routing to whoever has headroom
Because the two budgets never touch, the winning move isn't choosing one — it's keeping both signed in and sending each the work it's best at. The moment one hits its window, the other is almost always still open. The only friction is knowing which is which without stopping to check, and that's the whole point of seeing them monitored together in one place. The same panel tracks Kimi, GLM, and DeepSeek quotas alongside them, each with its own windows and reset times.
Common questions
Do Codex and Claude Code share the same usage limit?
No. They are billed by different providers — Codex through your ChatGPT plan, Claude Code through your Claude plan — so they have entirely separate budgets and separate reset clocks. Hitting the wall on one says nothing about how much room you have on the other.
Which has higher usage limits, Codex or Claude Code?
There's no single winner — it depends on the plan tier you're on with each, and both providers adjust their caps over time. Both meter on a rolling multi-hour window plus a weekly cap, so the practical answer is to watch the window that's tightest right now rather than trust a headline number. A notch monitor that shows both live makes that comparison something you glance at instead of calculate.
How do I check Codex and Claude Code usage at the same time?
Inside each CLI you can run /usage for a per-account view, but that's one command per tool, one session at a time. Vibe Island keeps both agents' current window percentage and reset countdown visible together in your Mac's notch, so you never have to ask either one.
Can I run Codex and Claude Code at once?
Yes — because their budgets are separate, many developers keep both signed in and send each the work it's best at. The only hard part is remembering who has headroom left, which is exactly the thing a single monitor for both solves.
Every agent's usage in one place
Codex and Claude Code are rarely the only agents on a Mac. Vibe Island tracks Claude Code, ZCode, Gemini CLI, Antigravity CLI, Cursor Agent, Trae, OpenCode, MiMoCode, Factory Droid, Qoder, Qwen, Grok Build, Kimi Code, DeepSeek, Mistral Vibe, Copilot, CodeBuddy, WorkBuddy, Kiro, Hermes, Amp, Pi Agent, Oh My Pi, and Gajae Code. in the same notch panel — sessions, approvals, and usage together. Read how to check Codex usage, how to check Claude Code usage, or see the full usage breakdown.
Vibe Island · macOS 14+
Watch Codex and Claude Code usage from your Mac notch
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