Musk cuts Grok Bot usage limits over "unsustainably high" costs

The source material is a short TechCrunch "In Brief" item, not an in-depth analysis, so this summary is brief and limited to what appears in the text.

Over the Halloween weekend, some users of Grok Bot, SpaceX's AI agent, found that their weekly usage limits had been used up even though they had not used it overnight. Several users said on X that their usage had jumped from as little as 50% to 100%.

Elon Musk, SpaceX's CEO, confirmed in a post on X on Sunday that it was not a technical glitch. Replying to a user's question, he wrote: "The cost of serving Grok Bot was unsustainably high relative to revenue." According to the article, he has not addressed the matter on his main account, where he continues to boast that Grok Bot can help buy gifts for the family.

Grok Bot is being held up as a success story for SpaceX, which is now publicly traded. According to the article, the company said in a filing last month that AI now accounts for 52% of its revenue. Its AI division, renamed "Super Intelligence," posted a profit of $431 million, something unusual in the AI industry. The profit would have been higher without $1.2 billion in one-time costs tied to the acquisition of Cursor.

Musk recently described Grok Bot as the "fastest-growing product I've ever seen." However, he has yet to explain how subscribers' usage limits will change going forward.

The episode highlights the tension between the growth of agentic AI products and the cost of serving them, a cost that can force companies to tighten usage limits even when the division is profitable overall.