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Elon Musk has spent years arguing that artificial intelligence will become more useful as it gets more capable. Grok Bot, from Space Exploration Technologies Corp. (NASDAQ:<\/a>SPCX<\/a>) unit SpaceXSI, is testing the other side of that promise: the more work users ask an AI agent to do<\/a>, the more expensive it can become to serve. <\/p>\n Musk acknowledged<\/a> that the cost of running the product was “unsustainably high relative to revenue,” just as subscribers complained about hitting usage limits early. <\/p>\n SpaceX’s Grok: Popularity Comes With a Bill <\/p>\n The admission came after an X user asked Musk whether Grok Bot’s weekly allowance could be reset, saying many users had exhausted their usage much sooner than expected. Musk did not disclose the product’s costs, revenue or usage limits, or outline a pricing change. <\/p>\n On SpaceX’s third-quarter earnings call<\/a>, management said Grok Bot had reached 800,000 paid weekly users earlier in October, more than doubling over the preceding month. Launched in August, the agent can carry out multi-step tasks through its own virtual computer. SpaceX executives said business customers were using it across sales, marketing, IT and engineering. <\/p>\n An agent may make repeated model calls, browse and take computer actions before delivering a result, requiring more computing resources than a short chatbot exchange. Musk’s comment points to a gap between subscription revenue and the cost of supporting that usage, although he did not quantify it. <\/p>\n Read Also:SpaceX’s Next Rally May Depend on AI Software, Not Just Rockets<\/a> <\/p>\n Figure AI’s Hark Sees an Opening <\/p>\n The complaint became a marketing opportunity for Hark. Brett Adcock, Figure AI CEO and Hark founder, urged users struggling with Grok Bot’s limits to try Hark, saying<\/a> its tiers were “incredibly generous.” <\/p>\n