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Claude Code vs Codex: Rate Limits, Pricing & Which to Use
A genuine head-to-head between Anthropic's Claude Code and OpenAI's Codex - how their rate limits work, what the plans cost, how usage is metered, who each is best for, and an honest verdict. Plus the path most heavy users actually take: run both.
Last updated June 2026 · Reflects the April 2026 Codex token-rate-card change · By Soren Starck
The Short Answer
There is no single winner. Claude Code and Codex are both excellent agentic coding tools, and the right one depends on the task in front of you. Claude Code tends to shine at large multi-file refactors and fast, decisive edits; Codex tends to shine at deep, step-by-step reasoning and ecosystem integration. Both throttle you the same way - a rolling 5-hour token window stacked with a weekly cap - so on either tool you will eventually hit a wall mid-session.
That shared limitation is why this comparison ends somewhere most don't: the best move for a daily user is often to run both, switch when one runs dry, and use a single tracker so you never have to pick blind.
Head-to-Head Comparison
| Claude Code | Codex | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Rate-limit model | Rolling 5-hour token window | Rolling 5-hour token window |
| Second cap | Weekly cap | Weekly cap |
| Metered by | Tokens | Tokens (since Apr 2026; reasoning depth multiplies burn) |
| Plans & price | Pro $20/mo · Max 5x $100/mo · Max 20x $200/mo | ChatGPT Plus $20/mo · Pro $200/mo |
| Built-in usage check | Session-limit warning (on-demand) | /status command |
| Strongest at | Multi-file refactors, fast agentic edits | Deep reasoning, OpenAI ecosystem |
| Best for | Rapid iteration across a codebase | Hard problems, long reasoning chains |
Prices above are the AI vendors' subscription prices, not SessionWatcher's. SessionWatcher's own pricing is covered further down.
Rate Limits: How Each One Throttles You
This is the area where the two are most alike - and most frustrating. Both Claude Code and Codex enforce a rolling 5-hour token window: tokens you spent five hours ago gradually become available again, rather than resetting all at once at midnight. On top of that, both stack a weekly cap that most developers forget about until it bites.
Claude Code limits scale by Anthropic plan tier. Pro gets standard limits, Max 5x gets roughly five times the capacity, and Max 20x roughly twenty times. The full mechanics are in our Claude Code rate limits guide.
Codex changed in April 2026: OpenAI switched to metering by tokens consumed rather than messages, and reasoning depth multiplies the burn - a single deep-reasoning request can eat several percent of a 5-hour window. Counting prompts no longer predicts when you'll be cut off. Details are in our Codex rate limits guide.
The practical consequence: the two tools run on independent clocks. When Claude Code locks you out, your Codex window may be nearly full - and vice versa. That's the structural reason running both is so effective.
Pricing & Plans
On raw subscription cost the two are comparable. Claude Code runs $20/mo (Pro), $100/mo (Max 5x), or $200/mo (Max 20x). Codex rides on your ChatGPT plan: $20/mo (Plus) up to $200/mo (Pro). If you're a heavy user, you may already be paying for the top tier of one and considering the other - in which case the marginal cost of running both is just the second subscription.
The expensive part isn't the subscription - it's the lost momentum when you hit a wall you didn't see coming. That's what a tracker prevents.
How to Check Usage on Each
Both tools ship a built-in snapshot, and both have the same flaw: they're on-demand, so you only look when you're already worried.
- Claude Code surfaces a session-limit warning (e.g. “90% of session limit”) - but only once you're already close.
- Codex CLI has the
/statuscommand, which prints remaining tokens for the 5-hour and weekly windows - but only while Codex is open, and only when you remember to run it.
Neither tells you, in your peripheral vision, “you have 18% of your Claude window left and 71% of your Codex window left.” That's the gap SessionWatcher fills.
SessionWatcherDon't pick blind.
Track Claude Code and Codex at once.
Native macOS menu bar app. Track Claude and Codex usage, costs, and rate limits in real-time.
“Fast, simple, and does exactly what it should. Definitely worth it.”
@nicojerome on GitHub
macOS 14+. 7-day Bundle trial. No credit card.
Who Each Is Best For
Choose Claude Code if you live in large codebases and want a tool that confidently makes coordinated edits across many files, iterates fast, and has a refined CLI workflow. It's a great default for day-to-day shipping.
Choose Codex if your work skews toward hard, reasoning-heavy problems - tricky algorithmic bugs, dense logic, architecture decisions - and you're already invested in the OpenAI/ChatGPT ecosystem.
Run both if you code all day. The two tools have complementary strengths and, crucially, independent rate-limit clocks. When one locks you out, the other almost always has headroom. The only catch is keeping track of which is which - which brings us to the verdict.
The Verdict
If you're forced to pick one, pick the tool whose strengths match your daily work: Claude Code for fast multi-file iteration, Codex for deep reasoning. But for anyone coding seriously every day, the honest recommendation is to stop treating it as either/or. Two subscriptions on two independent clocks give you far more usable capacity than upgrading a single tool to its top tier.
The one thing that makes “run both” actually work is visibility. SessionWatcher sits in your macOS menu bar and shows the live 5-hour window, weekly cap, and dollar cost for Claude Code and Codex - side by side. When one hits 90%, you switch to the other instead of losing your flow.
Track Both with SessionWatcher
SessionWatcher is a native macOS menu bar app with dedicated trackers for both tools. You don't have to choose:
- Single tool - Claude Code, Codex, or Cursor on its own: $6.99 one-time.
- Bundle - Claude + Codex + Cursor together: $14.99. The natural pick if you run both Claude Code and Codex.
- Pro - all 7 supported tools: $49 one-time, or $24/year.
Every option includes a 30-day refund. No vendor API keys, no scripts - download, paste your license key, and you're tracking both in under a minute.
SessionWatcherClaude + Codex + Cursor. One menu bar.
$14.99. No subscription.
Native macOS menu bar app. Track Claude and Codex usage, costs, and rate limits in real-time.
“Fast, simple, and does exactly what it should. Definitely worth it.”
@nicojerome on GitHub
macOS 14+. 7-day Bundle trial. No credit card.
Frequently Asked Questions
Is Claude Code or Codex better for coding?
It depends on the task. Claude Code is strong at multi-file refactoring and fast agentic edits; Codex is strong at deep reasoning and OpenAI ecosystem integration. Both enforce a 5-hour window plus a weekly cap, so neither is unlimited. Many developers keep both and switch as needed.
How do Claude Code and Codex rate limits differ?
Both use a rolling 5-hour token window plus a weekly cap. Claude Code scales by Pro / Max 5x / Max 20x; Codex scales by ChatGPT plan and, since April 2026, meters by tokens with reasoning depth multiplying the burn. They reset on independent clocks - see the Claude and Codex rate-limit guides.
Can I use Claude Code and Codex at the same time?
Yes. They're separate subscriptions with separate limits, so running both effectively doubles your capacity. The hard part is knowing which still has headroom - SessionWatcher shows both live in the menu bar.
How do I check Claude Code and Codex usage?
Claude Code shows a session-limit warning and Codex CLI has /status - both on-demand. For always-on tracking of both, SessionWatcher monitors them continuously and notifies you before a lockout.
Is SessionWatcher for Claude Code or for Codex?
Both, plus five more tools. Buy either alone for $6.99, the Bundle (Claude + Codex + Cursor) for $14.99, or Pro for $49 one-time ($24/year) for all 7 tools. 30-day refund on every option.