Elon Musk admits Grok Bot is too costly as users hit caps

· The Fresno Bee

If you pay for an AI assistant, the usage meter is the number you learn to watch. This past week, many paying users of Grok Bot, the AI agent from Space Exploration Technologies Corp. (SPCX), ran out days early.

When one subscriber asked Elon Musk on Nov. 1 for a reset, he didn’t promise one. “The cost of serving Grok Bot was unsustainably high relative to revenue,” Musk wrote on X. He offered no figures and no timeline.

Two days earlier, Musk had posted that “terrestrial compute will be peanuts compared to orbital compute.” His company also runs the largest AI data center by computing power, according to Epoch AI.

To me, that clash marks the moment Musk’s favorite growth story became a cost problem.

Also read: Tesla-SpaceX merger math just shifted in Tesla’s favor

Grok Bot works like an employee, not a chatbot

Grok Bot doesn’t answer one question and go quiet.

Bloomberg described it as built to work like an always-on employee. A chat reply uses a short burst of computing, while an agent keeps drawing on chips until the job is done.

Musk cheered that pattern on SpaceX’s earnings call on Oct. 20. “The usage of Grok bot grows over time per user; it does not decline.”

Paid weekly users reached 800,000 in early October, more than double the prior month, President Gwynne Shotwell said. For a plan that bundles usage into a monthly price, every heavy user increases costs.

Every Grok Bot hour is an hour SpaceX could rent out

The cost Musk described goes beyond electricity. SpaceX’s AI business, renamed Super Intelligence, brought in $7.6 billion in third-quarter revenue, according to its earnings release.

Fortune reported that the total includes computing capacity leased to outside customers.

CFO Bret Johnsen credited those cloud service deals for most of the segment’s growth. SpaceX, he added, will keep weighing which use pays best: renting chips out or serving its own products.

Answering Goldman Sachs Group analyst Eric Sheridan, Musk said SpaceX aims to split computing roughly evenly between itself and renters. Demand is strong enough, he said, that SpaceX could rent its capacity several times over.

Every hour a subscriber’s agent occupies a SpaceX chip, that chip isn’t earning market rent. I see “unsustainable” as a comparison with that rent, not just a gripe about power bills.

aire images / Getty Images

Earth’s data centers carry costs orbit would avoid

Colossus 2 in Memphis holds roughly 1.1 million H100 equivalents, Epoch estimates. The unit restates mixed hardware as H100s, a common AI chip, so sites can be compared. Epoch expects the site to reach about 1.8 million by early 2027, Seeking Alpha reported.

Powering it is the hard part. The NAACP sued xAI, SpaceX’s AI unit, on April 14, 2026. The suit alleges xAI ran 27 gas turbines without an air permit in Southaven, Mississippi, to power Colossus 2.

On Oct. 30, the day of Musk’s “peanuts” post, a federal judge refused to dismiss the case, DeSoto County News reported. The court rejected xAI’s argument that the turbines were exempt mobile sources. Mississippi permitted permanent turbines there in March, and xAI has said it plans to phase out the temporary ones.

Musk told analysts that suppliers say turbine blades and vanes run 12 to 18 months behind the rest of each machine. That lag slows new power on the ground.

SpaceX’s own IPO filing warned that data center demand outrunning power supply already imposes “unsustainable strains on terrestrial power grids.” The same word now describes Grok Bot.

The orbital pitch is built to delete those problems. The filing says the satellites would run on near-constant sunlight and use space itself for cooling. In orbit, there is no air permit to win, no neighbor to convince, and no grid connection to wait for.

What stands out to me is the workload SpaceX picked. The filing says SpaceX believes they can handle energy-hungry inference, the work of running AI models for users. That is exactly the work Grok Bot burns through.

More SpaceX:

SpaceX’s orbital timeline leaves subscribers waiting

Timing is the catch. The filing said orbital deployment could begin as early as 2028. Musk later moved the first launch to the fourth quarter of 2027, with significant scale in 2028, Bloomberg reported.

Before then, SpaceX can charge heavy users more, tighten allowances, or shift chips away from renters. Musk’s past-tense wording hints that a fix may be in place, though SpaceX hasn’t announced one.

The bigger shift reaches beyond SpaceX. Flat-fee AI plans were priced for people who chat, not for agents that work around the clock.

Musk is betting the cheapest home for those agents sits in orbit. Until a rocket proves it, every company selling AI agents faces the math Grok Bot users ran into this past week.

Related: SpaceX accuses T-Mobile, other carriers of trying to harm it

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This story was originally published November 2, 2026 at 5:17 PM.