Anthropic S-1: models older than six months earn under 20% of revenue
every · x · 2026-11-15
Anthropic filed to go public, and its S-1 quantifies the rapid model churn: models older than six months earn less than 20% of revenue. The $16.3B from H1 2026 came entirely before Opus 5.5 and Fable 5.1 shipped — as Mike Turner put it, "this is all Opus 5 money."
Other filing highlights:
- Customers from a year ago now pay 9x more
- Evan Armstrong likens Anthropic to a movie studio: only as good as your next release
The piece also shares a writing tip: give AI a document about who you are as a writer, put the project in a second doc, and ask whether the idea fits the person described.
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