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ChatGPT Pro 5x vs Google AI Ultra 5x
ChatGPT Pro 5x is for heavy Codex users committed to the OpenAI stack; Google AI Ultra 5x is for Antigravity users emptying the AI Pro window. ChatGPT Pro 5x costs $100/mo, 1.3x Google AI Ultra 5x's $80/mo.
Our verdict
The OpenAI ladder. Every paid ChatGPT rung runs the same Codex CLI and the same GPT 5.6 models; upgrading changes the weekly allowance and nothing else. Plus is already the lightest quota burn we measure, about 3% of its window per real-world run, so the upper rungs sell headroom most people never touch.
The Google ladder. It splits at $20. Below that, AI Plus is Gemini in the chat apps and no coding agent worth the name. From AI Pro up, every rung runs the same Antigravity CLI with the same models; Ultra buys volume, not capability.
ChatGPT Pro 5x is for heavy Codex users committed to the OpenAI stack; Google AI Ultra 5x is for Antigravity users emptying the AI Pro window.
ChatGPT Pro 5x costs $100/mo, 1.3x Google AI Ultra 5x's $80/mo.
We have not measured ChatGPT Pro 5x on its own plan; its card below points at the closest graded evidence.
We have not measured Google AI Ultra 5x on its own plan; its card below points at the closest graded evidence.
This tier answers a question almost nobody on Plus is asking. Codex burns about 3% of the weekly window per real-world run, so the extra allowance solves a limit most users never hit, and the agent underneath is the same either way.
Pros
- Five times the Plus allowance
- Codex stays the quickest agent we measure
Cons
- Solves a limit most Plus users never hit
- The agent does not improve with the price
Best for Heavy Codex users committed to the OpenAI stack.
How far it goes: we have not measured this plan
Same Codex CLI as ChatGPT Plus with a much bigger allowance - the Plus scorecards are the closest evidence.
The leaderboard lists every plan we do grade.
AI Pro's one real fault is the window: at about 13% of it per real-world run, eight runs a week is the budget. Ultra 5x exists to fix exactly that, and now that 3.7 Flash is worth running in volume, paying $80 for more of it is no longer a strange idea.
Pros
- Fixes the one thing wrong with AI Pro: the weekly window
- More of a model now worth running in volume
Cons
- Same Antigravity weaknesses at four times the price
- Chat users gain nothing over AI Pro
Best for Antigravity users emptying the AI Pro window.
How far it goes: we have not measured this plan
Same Antigravity CLI as AI Pro with a bigger allowance - the AI Pro scorecards are the closest evidence.
The leaderboard lists every plan we do grade.
Verdicts and prices are the quiz's versioned editorial catalog, last reviewed 2026-08-20; usage figures come from our own published runs and stay a share of each plan's own allowance. Any other pair composes on the subscription comparison, and the quiz turns your answers into a recommendation.
Frequently asked questions
Which should I pick, ChatGPT Pro 5x or Google AI Ultra 5x?
ChatGPT Pro 5x is for heavy Codex users committed to the OpenAI stack; Google AI Ultra 5x is for Antigravity users emptying the AI Pro window.
How much do ChatGPT Pro 5x and Google AI Ultra 5x cost?
ChatGPT Pro 5x costs $100/month (public price as of 2026-08-12); Google AI Ultra 5x costs $80/month (public price as of 2026-08-12).