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ChatGPT Pro 20x vs Google AI Ultra 20x
ChatGPT Pro 20x is for Codex-first teams who want the limit off the table; Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent. ChatGPT Pro 20x costs $200/mo, 1.1x Google AI Ultra 20x's $180/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 20x is for Codex-first teams who want the limit off the table; Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent.
ChatGPT Pro 20x costs $200/mo, 1.1x Google AI Ultra 20x's $180/mo.
We have not measured ChatGPT Pro 20x on its own plan; its card below points at the closest graded evidence.
We have not measured Google AI Ultra 20x on its own plan; its card below points at the closest graded evidence.
If Plus has a problem, the limit is not it: one real-world run costs about 3% of the weekly window. Twenty times that allowance is a lot of money aimed at the least pressing upgrade on this page, and the agent underneath does not change.
Pros
- The limit stops existing as a concern
- The quickest turnaround we measure
Cons
- Headroom on top of the most generous headroom here
- The agent is the same as on Plus
Best for Codex-first teams who want the limit off the table.
How far it goes: we have not measured this plan
Same Codex CLI as ChatGPT Plus with a far bigger allowance - the Plus scorecards are the closest evidence.
The leaderboard lists every plan we do grade.
At $180 you change how much Gemini you get, not what it can do: the agents are the same ones as the $20 plan, where 3.7 Flash is the good one and 3.1 Pro is not. Buy it for volume across the Google apps, or not at all.
Pros
- The most Gemini volume money buys
- 3.7 Flash is worth having in quantity
Cons
- Capability is identical to the $20 plan
- The Antigravity weaknesses come along
Best for Gemini at volume across Google apps, plus the agent.
How far it goes: we have not measured this plan
Same Antigravity CLI as AI Pro with a far 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 20x or Google AI Ultra 20x?
ChatGPT Pro 20x is for Codex-first teams who want the limit off the table; Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent.
How much do ChatGPT Pro 20x and Google AI Ultra 20x cost?
ChatGPT Pro 20x costs $200/month (public price as of 2026-08-12); Google AI Ultra 20x costs $180/month (public price as of 2026-08-12).