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Google AI Ultra 20x vs SuperGrok Heavy
Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent; SuperGrok Heavy is for Grok users who want the highest limits, whatever they cost. SuperGrok Heavy costs $300/mo, 1.7x Google AI Ultra 20x's $180/mo.
Our verdict
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.
The xAI ladder. It splits at $30. Lite, below that, is chat only; from SuperGrok up every rung runs the same Grok CLI and model. xAI publishes no usage multiples, so we cannot say what a bigger rung buys beyond "more". The one feature only this ladder sells is live X search, and only SuperGrok Plus has it.
Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent; SuperGrok Heavy is for Grok users who want the highest limits, whatever they cost.
SuperGrok Heavy costs $300/mo, 1.7x Google AI Ultra 20x's $180/mo.
We have not measured Google AI Ultra 20x on its own plan; its card below points at the closest graded evidence.
We have not measured SuperGrok Heavy on its own plan; its card below points at the closest graded evidence.
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.
The most expensive plan we track, and the least knowable: xAI publishes no usage multiple, so we cannot say what $300 buys beyond "more". The model is the same 4.6 that runs at $30, currently the slowest agent we run.
Pros
- The highest xAI limits sold
- The full Grok product, X features included
Cons
- Ten times the price of the $30 tier, same model
- No published multiple: the extra allowance is unquantified
Best for Grok users who want the highest limits, whatever they cost.
How far it goes: we have not measured this plan
Same Grok CLI as SuperGrok with a far bigger allowance - the SuperGrok scorecard is 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, Google AI Ultra 20x or SuperGrok Heavy?
Google AI Ultra 20x is for Gemini at volume across Google apps, plus the agent; SuperGrok Heavy is for Grok users who want the highest limits, whatever they cost.
How much do Google AI Ultra 20x and SuperGrok Heavy cost?
Google AI Ultra 20x costs $180/month (public price as of 2026-08-12); SuperGrok Heavy costs $300/month (public price as of 2026-08-12).