Winning the bill, losing the phone

Sensor Tower, which estimates app usage from store-panel data, pegged Anthropic's Claude app at about 56 million monthly users in mid-2026, up roughly 640% on the year. The headline writes itself, until you put it beside the number it is being compared to: ChatGPT's app, which the same firm clocked at a billion monthly users. Claude is one-eighteenth its size. A 640% rate is what a small base does; ChatGPT added users 62% faster from a base it would take Claude a decade of that growth to reach.

A 640% growth rate is what a small base sounds like when it grows; the durable number is the eighteen-to-one gap it is growing into.

The gap sharpens against where Anthropic is otherwise winning. Its revenue is up roughly eightyfold over a year, Claude Code is a multibillion-dollar business, and the company just raised at a thirty-billion-dollar valuation — all of it on enterprise and developer demand. The consumer phone is the one front where it barely registers. Anthropic has built a company that sells to companies; the mass-market app race it is hardly contesting.

Both figures are one firm's modeled estimates, not audited disclosures, and they describe app installs only — neither company's web traffic is in them. But the shape is the point. The story everyone tells about Anthropic is a money story; on the device most people actually carry, it is a rounding error against the incumbent, and the 640% is the sound a rounding error makes when it grows.