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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 limits work, what the plans cost, what uses them up, who each is best for, and an honest verdict. Plus the path most heavy users actually take: run both.
Last updated 1 November 2026 · Claude limits and prices checked that day at support.claude.com and claude.com/pricing, Codex limits and prices on 17 October 2026 at OpenAI's Codex pricing page · 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 limit you in five-hour periods (on Codex, Plus and Standard Business only; Pro plans currently have none); Claude adds a weekly limit that resets at a fixed time each week, and OpenAI says weekly limits may also apply to Codex. On either tool you can 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 | Session limit, resets every 5 hours | 5-hour limit on Plus and Standard Business; none on Pro for now |
| Second cap | Weekly limit across all models, fixed weekly reset | Weekly limits may apply |
| What uses it up | Allowance by plan, relative to Pro (Max 5x every 5 hours and every week, Ultra 10x a week) | Varies with the model and the size and complexity of tasks |
| Plans & price | Pro $20/mo (monthly billing) · Max $100/mo · Ultra $200/mo | ChatGPT Plus $20/mo · Pro $100, $200 or $500/mo |
| Built-in usage check | /usage command (plan usage limits) | /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 where the two are most alike, and most frustrating. Both limit you in five-hour periods. Anthropic says Claude's session-based limit resets every five hours; OpenAI lists a five-hour limit for Codex on Plus and Standard Business and none on Pro plans for now, and points you to the usage dashboard or /status for your reset times. On top of that sits a weekly limit: Claude's applies across all models and resets at a fixed time each week assigned to your account, and OpenAI says weekly limits may also apply to Codex.
Claude Code limits scale by Anthropic plan tier. Max gets five times the Pro plan's usage every five hours and every week, and Ultra, which replaced Max 20x, ten times Pro's week with no five-hour limit on a verified account, according to Anthropic's Max and Ultra plan articles. The full mechanics are in our Claude Code rate limits guide.
Codex limits follow your ChatGPT plan. OpenAI publishes estimates of local messages per five hours for Plus and Standard Business, says they are not fixed limits, and says the number depends on the model and on the size and complexity of your tasks; tasks that look alike can use different amounts. Counting prompts does not tell you when you will 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 limit may still have room, and the other way round. 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, billed monthly), $100/mo (Max) or $200/mo (Ultra); the full list is in Claude Code pricing. Codex rides on your ChatGPT plan: $20/mo (Plus), or $100, $200 or $500/mo (Pro). If you already pay for one and are considering the other, the cost of running both is 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 has the
/usagecommand, which shows subscribers their plan usage bars and what counts against them, but only when you remember to run it. - Codex CLI has the
/statuscommand, which shows your remaining limits during an active Codex CLI session, but 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.
SessionWatcher
Don't pick blind.
Track Claude Code and Codex at once.
Native app for the Mac menu bar and the Windows taskbar. Track Claude, Codex and 20 more tools' usage, costs, and rate limits in real time.
“Fast, simple, and does exactly what it should. Definitely worth it.”
@nicojerome on GitHub
macOS 14+. Free for 7 days, 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 Mac menu bar or Windows taskbar and shows the 5-hour and weekly limits, their reset times and an estimated API-equivalent 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 app for Mac and Windows with dedicated trackers for both tools. You don't have to choose:
- Single tool: Claude Code, Codex, or Cursor on its own: $8.99 one-time.
- Bundle: Claude + Codex + Cursor together: $19.99. The natural pick if you run both Claude Code and Codex.
- Pro, all supported tools: $79 one-time, or $24/year.
Every option includes a 14-day refund. No vendor API keys, no scripts: download, paste your licence key, and you're tracking both. One licence key works on Mac and Windows.
SessionWatcherClaude + Codex + Cursor. One menu bar.
$19.99. No subscription.
Native app for the Mac menu bar and the Windows taskbar. Track Claude, Codex and 20 more tools' usage, costs, and rate limits in real time.
“Fast, simple, and does exactly what it should. Definitely worth it.”
@nicojerome on GitHub
macOS 14+. Free for 7 days, 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. Claude limits you in five-hour sessions with a weekly limit on top; Codex has a five-hour limit on Plus and Standard Business (none on Pro for now), and OpenAI says weekly limits may also apply. Many developers keep both and switch as needed.
How do Claude Code and Codex rate limits differ?
Claude's session limit resets every five hours and its weekly limit, across all models, at a fixed time each week; Max gets five times Pro's usage every five hours and every week, and Ultra ten times Pro's week with no five-hour limit for verified accounts. OpenAI lists a five-hour Codex limit on Plus and Standard Business, none on Pro for now, says weekly limits may apply, and says usage depends on the model and on task size and complexity (Anthropic's pages checked 1 November 2026, OpenAI's 17 October 2026). They reset on independent clocks; details in 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 Mac menu bar or Windows taskbar.
How do I check Claude Code and Codex usage?
Claude Code has /usage 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 your broader AI-coding stack. Buy either alone for $8.99, the Bundle (Claude + Codex + Cursor) for $19.99, or Pro for $79 one-time ($24/year) for all supported tools. 14-day refund on every option.