Anthropic, the AI company behind Claude, is rumored to be eyeing a $900 billion IPO valuation, and if that number doesn't make you at least a little nervous, you haven't been paying attention to tech history.

Let's start with what's real: Anthropic's revenue growth is genuinely impressive. They hit $44 billion in annualized revenue by April 2026, up from just $87 million in January 2024. Their Claude Code product became what some are calling "the fastest-growing enterprise software product in history," reaching $1 billion in annual revenue with over 1,000 companies each spending more than $1 million per year.

That's legitimately fast growth. For context, Salesforce took 20 years to hit $30 billion in annual revenue. Anthropic did more than that in under three years.

But here's where the valuation math gets dicey: Anthropic is trading at 20x revenue, compared to Microsoft at 12x, Salesforce at 8x, and Oracle at 6x. You're paying a massive premium for growth, which is fine – until it's not.

The bull case says if revenue hits $100 billion by the end of 2026, that $900 billion valuation would work out to about 9x forward revenue. That's... better, but it assumes the growth train keeps rolling without any hiccups. And hiccups are coming.

Problem #1: Profitability is a mirage. Anthropic claims they'll be profitable in Q2 2026, but that's during "discounted introductory rates" on their SpaceX compute contracts. Full pricing – around $1.25 billion per month – kicks in Q3 2026. That's the real test. When you're spending $15 billion per year on compute with only 40% gross margins, you have almost zero room for error.

Problem #2: Open-source competition is eating your lunch. According to the analysis, DeepSeek and Meta's Llama models are When your competitors are giving away similar tech for free, your pricing power evaporates. And Anthropic doesn't have much pricing power to give up.