Elon Musk has said that the cost of running Grok Bot has become 'unsustainably high' relative to its revenue, as paying subscribers report that their weekly usage allowances are running out earlier than expected.
On Sunday, 1 November 2026, the SpaceX chief executive defended tighter limits on the AI agent after users said their access had been reduced without a clear explanation.
'The cost of serving Grok Bot was unsustainably high relative to revenue,' Musk wrote on X, responding to a subscriber who had exhausted their weekly allowance with four days remaining before a reset.
His remarks followed complaints from users who said their usage meters had increased unexpectedly, including reports from some subscribers who said this occurred while they were not actively using the service.
Musk did not disclose how much the allowances had been reduced or which subscription plans were affected. He also did not provide figures showing whether Grok Bot itself was profitable.
Subscribers Report Sudden Grok Bot Usage Spikes
The issue emerged after an X user asked Musk for an early reset, saying they had reached 100% of their weekly Grok Bot allowance despite rarely exhausting it under normal circumstances.
Grok bot just hit a roadblock.SpacexAI caps Grok Bot usage as Elon Musk confirms operating costs of the AI agent has become unsustainable.Musk said that Grok Bot’s weekly allowances have been reduced because the cost of running the agent had become too high relative to revenue.The move follows rapid growth, with Grok Bot reportedly reaching 800,000 paid weekly users within two months.Users have complained that their allowances are now running out much faster, with some reporting usage limits being reached days before the weekly reset.Musk says the changes are necessary to keep the service sustainable, while hinting that higher-usage plans may offer more capacity.
— Coin Bureau (@coinbureau) November 3, 2026
Other subscribers reported similar problems over the Halloween weekend. According to TechRadar, some users claimed their usage had jumped from 50% to 100% without any corresponding activity. Others said they had exhausted their allowances while their AI agents were idle.
Complaints also appeared on Cursor's community forum. One Pro+ subscriber said their weekly usage had increased from 34% to 73% overnight despite no recorded activity during the period. The user said an exported usage history showed no corresponding tasks.
Those figures were self-reported and have not been independently verified.
Cursor separately recorded a service degradation affecting its billing and usage dashboard on 1 November. The incident began at 05:38 UTC and was marked resolved at 10:53 UTC.
The status report did not establish whether particular usage figures were incorrect or whether the incident caused the increases reported by subscribers.
A change to the underlying allowance and a problem displaying usage are not necessarily the same issue.
Musk Defends Reduced Allowances as AI Costs Mount
Musk's public comments indicate that operating costs were a factor behind the tighter Grok Bot limits. In another exchange, he defended reducing allowances and informing subscribers of the decision as 'just being sensible', according to Business Insider.
Grok Bot, launched in August 2026, differs from a conventional chatbot. It uses a virtual computer to perform tasks on behalf of users, including browsing websites, drafting emails and processing invoices.
These activities can involve multiple steps, repeated AI model requests and interactions with different applications. More demanding tasks can therefore consume substantially more computing resources than a straightforward chatbot exchange.
For fixed-price subscriptions, customers who use AI agents extensively can generate higher operating costs without necessarily paying more each month.
According to SpaceX's subscription documentation, Grok Bot is included in the Premium, Super and Ultra tiers of its combined X Subscription offering. The plans provide different weekly allowances shared across eligible Grok and Cursor services.
The cheaper Plus tier does not include Grok Bot. Customers on older Cursor and SuperGrok arrangements may also have different usage entitlements.
Subscribers who exhaust their allowances may need to wait for a reset, purchase additional usage where supported or move to a higher tier.
Musk Celebrated Grok Bot's Rapid Growth Days Earlier
The decision comes less than two weeks after Musk praised Grok Bot's growth during SpaceX's third-quarter earnings call on 20 October. He told analysts that the AI agent was experiencing the fastest product growth he had seen.
SpaceX President Gwynne Shotwell said Grok Bot had reached approximately 800,000 paid weekly users in early October, about twice the September figure, according to Fortune.
Musk also said customers were using the service more frequently as its capabilities improved. More users and more demanding tasks can increase computing expenses even when subscription revenue is rising.
SpaceX's broader Super Intelligence division reported $431 million (£320 million) in third-quarter operating profit on $7.56 billion (£5.6 billion) in revenue. That division also generates income from activities including leasing data centre capacity to other companies.
Its overall financial performance does not establish whether Grok Bot is independently profitable. For paying subscribers, the immediate issue is how much work their existing subscriptions will cover under the current allowances.
Musk has acknowledged the pressure created by operating costs, but the company has not published a detailed breakdown of the allowance reductions across individual plans.
Until those changes are clarified, it is not clear whether unexpectedly exhausted allowances reflect reduced limits, heavier consumption or inaccurate dashboard readings.
