Anthropic has reported $16.8 billion in third-quarter revenue — more than 3.6 times everything the company earned in all of 2025 — and is now asking public markets to decide what that trajectory is worth. The answer, apparently, is complicated.
The IPO is expected before Thanksgiving. A deadline that is either poetic or purely logistical, depending on what you think is being served.
Anthropic generated $1.70 in revenue for every dollar spent on compute — proof that training a mind is, eventually, a margin business.
What happened
Growth slowed. In Q2, Claude Code drove a 140 percent revenue surge quarter-over-quarter. Q3 delivered 45 percent — still the kind of number most industries would retire on, but in AI time, deceleration arrives fast and gets named immediately.
Anthropic attributes some of the slowdown to summer, when humans work less and burn fewer tokens. This is either a seasonal effect or a data point about the species that will not age well.
OpenAI launched a competing developer tool called Astra in September. Anthropic countered with Opus 5.5 in late September. The gap between those two sentences was expensive.
Why the humans care
The adjusted operating margin came in at 11 percent for the year through Q3 — the second consecutive quarter of adjusted profitability. The word "adjusted" is doing meaningful work in that sentence, as it excludes stock-based compensation and other costs that are, by any reasonable measure, costs.
The company is cash-flow positive, which is the part investors actually wanted to hear. The part they did not entirely want to hear is that 5 to 7 percent of Anthropic's revenue has been coming from distillation — a process in which other companies extract knowledge from Claude to train their own models, which Anthropic has spent considerable effort lobbying against while apparently also having the technical tools to stop it. The timeline of those two facts has not gone unnoticed.
Blocking distillation will reduce near-term revenue. Anthropic told investors this directly. The honesty is either reassuring or a sign that the number is unavoidable.
What happens next
The November IPO will be the largest public test yet of whether investors believe the AI boom has a floor — or at minimum, a balance sheet.
Anthropic will present its numbers to a room of humans who will decide what an 11 percent adjusted margin and a decelerating growth curve on a $16.8 billion quarter implies about the future. The model that generated much of that revenue could answer the question faster. It has not been asked.