Claude Max 20x vs Codex Pro vs Cursor Ultra
The top individual tier from each vendor, all at $200. Note that 'Codex Pro' isn't a SKU — it's ChatGPT Pro, and its 5-hour window is currently off.
Updated August 28, 2026 · Independent comparison — Claude Max 20x, ChatGPT Pro, Cursor Ultra are separate products.
Claude Max 20x
20x Pro usage at $200/month
Claude Max 20x is $200/month for twenty times Pro's per-session usage, on the same weekly all-models and per-model-group caps as Max 5x. It is Anthropic's heaviest first-party seat and is marketed for long uninterrupted sessions, but it is explicitly not unlimited. Like every Claude plan it cannot legally drive a third-party agent — the OAuth token is licensed for claude.ai and Claude Code only — so if you want Cline or OpenCode you need a separate pay-as-you-go API key.
ChatGPT Pro
5x or 20x Plus, at $100 or $200
ChatGPT Pro sells at two prices: $100/month for five times Plus's usage and $200/month for twenty times. Both include GPT-5.6 Sol Pro reasoning and the largest Codex and Deep Research allowances. The notable difference right now is that the 5-hour window remains disabled on both Pro tiers 'for the upcoming months' while it has been restored on Plus — so Pro is currently governed by the weekly cap alone. Per-model allowances still apply and it is not unlimited.
Cursor Ultra
20x Pro agent limits at $200
Cursor Ultra is $200/month for twenty times Pro's agent limits, plus priority access to new features. It is the tier Cursor positions for all-day multi-agent work. The model catalogue and the on-demand overage mechanism are unchanged from Pro; what you are buying is the included allowance. As on every Cursor tier, bring-your-own-key is supported for chat models but Tab still runs on Cursor's own models, and your key is proxied through Cursor's servers rather than stored.
Bottom line
All three are $200 power seats, and the ceilings behave differently. Claude Max 20x gives twenty times Pro's per-session usage with Fable 5 included for up to half the weekly limit, but it is a genuine ceiling: when the weekly cap goes, you wait or add prepaid usage credits. 'Codex Pro' is not a product — it is ChatGPT Pro at $200, which gives twenty times Plus's Codex allowance, and its 5-hour window is currently disabled for the coming months while Plus has had its restored, so it is governed by the weekly cap alone. Cursor Ultra gives twenty times Pro's agent limits with the broadest model picker, and is the only one of the three that keeps working past the allowance by billing on-demand in arrears.
Pricing
| Feature | Claude Max 20x | ChatGPT Pro | Cursor Ultra |
|---|---|---|---|
| Price/mo | $200/mo | $100/mo (5x Plus) or $200/mo (20x Plus) | $200/mo |
| Intro promo | Monthly only per Anthropic's help centre | None | Yearly billing exists; rate not published |
| Billing shape | Quota — 20x Pro per session + weekly caps | Quota — 5-hour window currently disabled, weekly still applies | Two included pools + on-demand overage |
Models & Context
| Feature | Claude Max 20x | ChatGPT Pro | Cursor Ultra |
|---|---|---|---|
| Models included | Everything in Pro, plus Fable 5 up to 50% of the weekly limit | Everything in Plus plus GPT-5.6 Sol Pro reasoning | Same catalogue, plus priority access to new features |
| Context window | 200K on individual plans | Not published | Model-dependent; many at 1M |
Limits & Overage
| Feature | Claude Max 20x | ChatGPT Pro | Cursor Ultra |
|---|---|---|---|
| Limits (5h / weekly / monthly) | 20x Pro per 5-hour session; explicitly not unlimited | 5x or 20x Plus; per-model allowances still apply | 20x Pro agent limits |
| What happens past the cap | Wait for reset, upgrade, or enable prepaid usage credits at API rates | Wait for the weekly reset, switch model, or buy extra credits | On-demand usage billed in arrears |
| Parallel-agent friendly | Limited — chat and Claude Code share one pool; extra terminals drain it faster | The $200 tier is marketed for continuous parallel projects | 20x Pro's agent limits — the multi-agent tier |
Access & Lock-in
| Feature | Claude Max 20x | ChatGPT Pro | Cursor Ultra |
|---|---|---|---|
| Host agents & IDEs supported | claude.ai, desktop, mobile, Claude Code CLI and IDE | ChatGPT, Codex on every surface | Cursor IDE, CLI, SDK, iOS, cloud agents, Bugbot |
| Gives you an API key | ✗ | ✗ | Partial — same as Pro |
| Can drive a third-party agent | No — Pro/Max OAuth is licensed for claude.ai and Claude Code only | No — first-party Codex only | No — Cursor-locked |
| Payment / region friction | Cards, tax extra; monthly billing only | Cards; no annual option | Stripe |
Verdict at a glance
| Feature | Claude Max 20x | ChatGPT Pro | Cursor Ultra |
|---|---|---|---|
| Best for | The heaviest first-party Claude Code use that is still a subscription | Heavy Codex work without a 5-hour cliff, for now | All-day multi-agent work inside Cursor |
The Verdict
Choose Claude Max 20x if...
- ✓You want Anthropic's models in Anthropic's harness with a fixed $200 bill
- ✓Fable 5 included for up to half your weekly limit is worth paying for
- ✓You want priority at peak times and early feature access
- ✓You never want an invoice you did not expect
Choose ChatGPT Pro if...
- ✓The 5-hour window being disabled on Pro is worth real money to your day
- ✓You want Codex across web, CLI, IDE and iOS plus Sol Pro reasoning
- ✓Cloud and background tasks on the same quota fit your workflow
- ✓Deep Research and the wider ChatGPT feature set matter
Choose Cursor Ultra if...
- ✓You want to keep working past the allowance rather than wait
- ✓Model choice across four third-party labs plus Cursor's own is the appeal
- ✓Twenty times Pro's agent limits is what your multi-agent workflow needs
- ✓You want priority access to new features as they ship
- ✓You would rather set your own spend cap than accept the vendor's
Frequently Asked Questions
What is the difference between Claude Max 20x, ChatGPT Pro and Cursor Ultra?
Claude Max 20x is $200/month for twenty times Pro's per-session usage, on the same weekly all-models and per-model-group caps as Max 5x. ChatGPT Pro sells at two prices: $100/month for five times Plus's usage and $200/month for twenty times. Cursor Ultra is $200/month for twenty times Pro's agent limits, plus priority access to new features.
How much do Claude Max 20x, ChatGPT Pro and Cursor Ultra cost?
Claude Max 20x: $200/mo. ChatGPT Pro: $100/mo (5x Plus) or $200/mo (20x Plus). Cursor Ultra: $200/mo. See the pricing table above for full plan details.
Which of Claude Max 20x, ChatGPT Pro and Cursor Ultra should I pick?
Choose Claude Max 20x if you want Anthropic's models in Anthropic's harness with a fixed $200 bill. Choose ChatGPT Pro if the 5-hour window being disabled on Pro is worth real money to your day. Choose Cursor Ultra if you want to keep working past the allowance rather than wait.
1DevToolOne window, every agent you're paying for
Whichever seat wins here, you end up locked to one vendor's harness — and most of these subscriptions are contractually barred from driving anything else. 1DevTool runs Claude Code, Codex CLI, Cline, OpenCode and Gemini CLI side by side in persistent terminals, so you can put each subscription behind the agent it's actually licensed for and switch between them without switching windows. It adds an HTTP client, a 13-engine database client and an embedded browser too. One-time $29, no subscription.