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⚠ Eighty Percent of the Quarter Came From Models Six Months OldModerate threat

Anthropic (ANT) — threat to the moat

Over 80% of Anthropic revenue in the September 2026 quarter came from models released in the previous six months, so the company cannot stop shipping.

The loop has a cost that the company reports without comment. "For example, model versions released in the six months ended September 30, 2026 accounted for over 80% of our revenue for the three months ended September 30, 2026"1. Almost the entire revenue base was earned by models that did not exist two quarters earlier.

How quickly the revenue base turns overRevenue from model versions released in the prior six monthsover 80% of the quarter to 30 September 2026Release cadencecontinuous and overlapping, inherent to the frontierReleased in September 2026 aloneMythos 5.1, Fable 5.1 and Opus 5.5Customer spend, two weeks to 2 January 2026about 20% below the prior two weeksModel classesMythos including Fable, Opus, Sonnet and HaikuAnthropic Form S-1: customer usage patterns and the model line
Nothing in the revenue base is more than two quarters old.

The filing says the cadence is not optional: "The continuous and overlapping cadence of new model version releases is inherent to remaining at the frontier of AI development"2. The release record bears it out, with Mythos 5.1, Fable 5.1 and Opus 5.5 all arriving in September 20263.

That makes revenue unusually sensitive to timing. The company discloses one quantified example of how quickly spend moves: "for the two weeks ended January 2, 2026, total customer spend declined by approximately 20% compared to the prior two weeks ended December 19, 2025"4, which it attributes to the code freezes customers schedule over holidays.

A business whose revenue base is six months old cannot pause. The safety facet of this moat describes a policy that can delay a release, and this is the page that prices what a delay costs.

The signal would be a quarter in which no new model version shipped. Watch the share of revenue from models released in the prior six months: a fall would mean the installed base has started to carry the company, and a rise means the treadmill is turning faster.

References
  1. Reported"For example, model versions released in the six months ended September 30, 2026 accounted for over 80% of our revenue for the three months ended September 30, 2026".
    Anthropic, PBC, Form S-1 registration statement (Registration No. 333-299633), filed 26 October 2026 - revenue $41M (2023), $386M (2024), $4,585M (2025), $1,163M (H1 2025) and $16,286M (H1 2026); operating loss $(551)M, $(2,980)M, $(8,060)M, $(2,135)M and $(693)M; net loss $(1,531)M, $(8,309)M, $(41,965)M, $(12,969)M and $(80,748)M, after a change in the fair value of convertible notes, derivative liabilities and SAFEs of $(72,388)M in the first half of 2026; net loss per share $(1.42), $(5.43), $(23.04), $(7.25) and $(39.88); operating expenses in the first half of 2026 of compute and infrastructure $8,945M, personnel $3,152M, sales, marketing and partnerships $3,168M and other operating and administrative $1,714M, presented by nature with no cost-of-revenue line on the face of the statement, while Note 8 regroups the same expenses by function and gives cost of revenue of $26M, $752M, $2,773M, $1,019M and $2,380M against research and development of $422M, $2,275M, $6,338M, $1,850M and $9,741M; a Bartz settlement line of $1,500M in 2025; interest income $1,111M in the first half of 2026; revenue by geography United States $34M, $263M, $3,362M, $820M and $11,763M and International $7M, $123M, $1,223M, $343M and $4,523M; total assets $147,358M, cash and short-term investments $131,651M, accounts receivable $5,833M, convertible notes payable $108,566M, redeemable convertible preferred stock $157,510M and a total stockholders' deficit of $(127,619)M at 30 June 2026; 853,394 thousand preferred, 2,157,398 thousand Class A and 30,643 thousand Class N shares outstanding at that date; Net Revenue Retention of approximately 900 % and more than 11,900 customers above $100,000 of trailing revenue at 30 September 2026, up from more than 950 a year earlier, with more than 1,900 above $1 million and approximately 250 above $10 million; over 50% of the Fortune 500 and over 30% of the Global 2000 among them, Anthropic's revenue averaging less than 0.1% of those Fortune 500 customers' total expenses; revenue through cloud service provider marketplaces of 11% (2023), 32% (2024), 47% (2025), 44% (H1 2025) and 48% (H1 2026); $20,000M, $15,000M and $42,000M of undrawn committed note purchase agreements with Google, Amazon and an infrastructure partner; non-cancelable purchase commitments of $54,559M at 31 December 2025 rising to approximately $265.6 billion at 30 June 2026 with terms of one to 20 years, plus leases not yet commenced of approximately $50.2 billion and $321.4 billion at those dates, and named commitments of about $161.2 billion of Broadcom equipment leases, up to $120.5 billion with SpaceX.AI LLC for NVIDIA GPU compute, at least about $114.5 billion with Google, at least $110.0 billion with Amazon, up to about $44.6 billion with Nscale and at least $44.9 billion with Microsoft; a $1.5 billion Bartz copyright settlement approved by the district court in July 2026; a September 2026 Sherman Act class action alleging the frontier developers agreed to slow the pace of model improvement; a Department of War supply-chain risk designation under Section 4713 upheld 2-1 by the D.C. Circuit on 25 September 2026 with a petition for rehearing en banc pending, and June 2026 Commerce export restrictions that led Anthropic to disable Fable 5 and Mythos 5 for every customer; over 90% of contributions to its own codebase written by Claude in September 2026; one share of Class T common stock electing a majority of the board, Class A voting power capped at 49.9%, and Amazon and Google each holding more than five percent of capital stock while appearing in no row of the beneficial-ownership table, which covers voting securities only; and the statement that prior to the offering there has been no public market for the Class A common stock - the operating metrics and their definitions and limitations. — 2023 to 30 September 2026 · publ. 26 October 2026 · source ↗
  2. ReportedThe filing says the cadence is not optional: "The continuous and overlapping cadence of new model version releases is inherent to remaining at the frontier of AI development".
    Anthropic, PBC, Form S-1 registration statement (Registration No. 333-299633), filed 26 October 2026 - revenue $41M (2023), $386M (2024), $4,585M (2025), $1,163M (H1 2025) and $16,286M (H1 2026); operating loss $(551)M, $(2,980)M, $(8,060)M, $(2,135)M and $(693)M; net loss $(1,531)M, $(8,309)M, $(41,965)M, $(12,969)M and $(80,748)M, after a change in the fair value of convertible notes, derivative liabilities and SAFEs of $(72,388)M in the first half of 2026; net loss per share $(1.42), $(5.43), $(23.04), $(7.25) and $(39.88); operating expenses in the first half of 2026 of compute and infrastructure $8,945M, personnel $3,152M, sales, marketing and partnerships $3,168M and other operating and administrative $1,714M, presented by nature with no cost-of-revenue line on the face of the statement, while Note 8 regroups the same expenses by function and gives cost of revenue of $26M, $752M, $2,773M, $1,019M and $2,380M against research and development of $422M, $2,275M, $6,338M, $1,850M and $9,741M; a Bartz settlement line of $1,500M in 2025; interest income $1,111M in the first half of 2026; revenue by geography United States $34M, $263M, $3,362M, $820M and $11,763M and International $7M, $123M, $1,223M, $343M and $4,523M; total assets $147,358M, cash and short-term investments $131,651M, accounts receivable $5,833M, convertible notes payable $108,566M, redeemable convertible preferred stock $157,510M and a total stockholders' deficit of $(127,619)M at 30 June 2026; 853,394 thousand preferred, 2,157,398 thousand Class A and 30,643 thousand Class N shares outstanding at that date; Net Revenue Retention of approximately 900 % and more than 11,900 customers above $100,000 of trailing revenue at 30 September 2026, up from more than 950 a year earlier, with more than 1,900 above $1 million and approximately 250 above $10 million; over 50% of the Fortune 500 and over 30% of the Global 2000 among them, Anthropic's revenue averaging less than 0.1% of those Fortune 500 customers' total expenses; revenue through cloud service provider marketplaces of 11% (2023), 32% (2024), 47% (2025), 44% (H1 2025) and 48% (H1 2026); $20,000M, $15,000M and $42,000M of undrawn committed note purchase agreements with Google, Amazon and an infrastructure partner; non-cancelable purchase commitments of $54,559M at 31 December 2025 rising to approximately $265.6 billion at 30 June 2026 with terms of one to 20 years, plus leases not yet commenced of approximately $50.2 billion and $321.4 billion at those dates, and named commitments of about $161.2 billion of Broadcom equipment leases, up to $120.5 billion with SpaceX.AI LLC for NVIDIA GPU compute, at least about $114.5 billion with Google, at least $110.0 billion with Amazon, up to about $44.6 billion with Nscale and at least $44.9 billion with Microsoft; a $1.5 billion Bartz copyright settlement approved by the district court in July 2026; a September 2026 Sherman Act class action alleging the frontier developers agreed to slow the pace of model improvement; a Department of War supply-chain risk designation under Section 4713 upheld 2-1 by the D.C. Circuit on 25 September 2026 with a petition for rehearing en banc pending, and June 2026 Commerce export restrictions that led Anthropic to disable Fable 5 and Mythos 5 for every customer; over 90% of contributions to its own codebase written by Claude in September 2026; one share of Class T common stock electing a majority of the board, Class A voting power capped at 49.9%, and Amazon and Google each holding more than five percent of capital stock while appearing in no row of the beneficial-ownership table, which covers voting securities only; and the statement that prior to the offering there has been no public market for the Class A common stock - the operating metrics and their definitions and limitations. — 2023 to 30 September 2026 · publ. 26 October 2026 · source ↗
  3. ReportedThe release record bears it out, with Mythos 5.1, Fable 5.1 and Opus 5.5 all arriving in September 2026.
    Anthropic, PBC, Form S-1 registration statement (Registration No. 333-299633), filed 26 October 2026 - revenue $41M (2023), $386M (2024), $4,585M (2025), $1,163M (H1 2025) and $16,286M (H1 2026); operating loss $(551)M, $(2,980)M, $(8,060)M, $(2,135)M and $(693)M; net loss $(1,531)M, $(8,309)M, $(41,965)M, $(12,969)M and $(80,748)M, after a change in the fair value of convertible notes, derivative liabilities and SAFEs of $(72,388)M in the first half of 2026; net loss per share $(1.42), $(5.43), $(23.04), $(7.25) and $(39.88); operating expenses in the first half of 2026 of compute and infrastructure $8,945M, personnel $3,152M, sales, marketing and partnerships $3,168M and other operating and administrative $1,714M, presented by nature with no cost-of-revenue line on the face of the statement, while Note 8 regroups the same expenses by function and gives cost of revenue of $26M, $752M, $2,773M, $1,019M and $2,380M against research and development of $422M, $2,275M, $6,338M, $1,850M and $9,741M; a Bartz settlement line of $1,500M in 2025; interest income $1,111M in the first half of 2026; revenue by geography United States $34M, $263M, $3,362M, $820M and $11,763M and International $7M, $123M, $1,223M, $343M and $4,523M; total assets $147,358M, cash and short-term investments $131,651M, accounts receivable $5,833M, convertible notes payable $108,566M, redeemable convertible preferred stock $157,510M and a total stockholders' deficit of $(127,619)M at 30 June 2026; 853,394 thousand preferred, 2,157,398 thousand Class A and 30,643 thousand Class N shares outstanding at that date; Net Revenue Retention of approximately 900 % and more than 11,900 customers above $100,000 of trailing revenue at 30 September 2026, up from more than 950 a year earlier, with more than 1,900 above $1 million and approximately 250 above $10 million; over 50% of the Fortune 500 and over 30% of the Global 2000 among them, Anthropic's revenue averaging less than 0.1% of those Fortune 500 customers' total expenses; revenue through cloud service provider marketplaces of 11% (2023), 32% (2024), 47% (2025), 44% (H1 2025) and 48% (H1 2026); $20,000M, $15,000M and $42,000M of undrawn committed note purchase agreements with Google, Amazon and an infrastructure partner; non-cancelable purchase commitments of $54,559M at 31 December 2025 rising to approximately $265.6 billion at 30 June 2026 with terms of one to 20 years, plus leases not yet commenced of approximately $50.2 billion and $321.4 billion at those dates, and named commitments of about $161.2 billion of Broadcom equipment leases, up to $120.5 billion with SpaceX.AI LLC for NVIDIA GPU compute, at least about $114.5 billion with Google, at least $110.0 billion with Amazon, up to about $44.6 billion with Nscale and at least $44.9 billion with Microsoft; a $1.5 billion Bartz copyright settlement approved by the district court in July 2026; a September 2026 Sherman Act class action alleging the frontier developers agreed to slow the pace of model improvement; a Department of War supply-chain risk designation under Section 4713 upheld 2-1 by the D.C. Circuit on 25 September 2026 with a petition for rehearing en banc pending, and June 2026 Commerce export restrictions that led Anthropic to disable Fable 5 and Mythos 5 for every customer; over 90% of contributions to its own codebase written by Claude in September 2026; one share of Class T common stock electing a majority of the board, Class A voting power capped at 49.9%, and Amazon and Google each holding more than five percent of capital stock while appearing in no row of the beneficial-ownership table, which covers voting securities only; and the statement that prior to the offering there has been no public market for the Class A common stock - the product sections: the Claude model family, Claude Platform and its primitives, Claude Code and the first-party applications. — 2023 to 30 September 2026 · publ. 26 October 2026 · source ↗
  4. ReportedThe company discloses one quantified example of how quickly spend moves: "for the two weeks ended January 2, 2026, total customer spend declined by approximately 20% compared to the prior two weeks ended December 19, 2025", which it attributes to the code freezes customers schedule over holidays.
    Anthropic, PBC, Form S-1 registration statement (Registration No. 333-299633), filed 26 October 2026 - revenue $41M (2023), $386M (2024), $4,585M (2025), $1,163M (H1 2025) and $16,286M (H1 2026); operating loss $(551)M, $(2,980)M, $(8,060)M, $(2,135)M and $(693)M; net loss $(1,531)M, $(8,309)M, $(41,965)M, $(12,969)M and $(80,748)M, after a change in the fair value of convertible notes, derivative liabilities and SAFEs of $(72,388)M in the first half of 2026; net loss per share $(1.42), $(5.43), $(23.04), $(7.25) and $(39.88); operating expenses in the first half of 2026 of compute and infrastructure $8,945M, personnel $3,152M, sales, marketing and partnerships $3,168M and other operating and administrative $1,714M, presented by nature with no cost-of-revenue line on the face of the statement, while Note 8 regroups the same expenses by function and gives cost of revenue of $26M, $752M, $2,773M, $1,019M and $2,380M against research and development of $422M, $2,275M, $6,338M, $1,850M and $9,741M; a Bartz settlement line of $1,500M in 2025; interest income $1,111M in the first half of 2026; revenue by geography United States $34M, $263M, $3,362M, $820M and $11,763M and International $7M, $123M, $1,223M, $343M and $4,523M; total assets $147,358M, cash and short-term investments $131,651M, accounts receivable $5,833M, convertible notes payable $108,566M, redeemable convertible preferred stock $157,510M and a total stockholders' deficit of $(127,619)M at 30 June 2026; 853,394 thousand preferred, 2,157,398 thousand Class A and 30,643 thousand Class N shares outstanding at that date; Net Revenue Retention of approximately 900 % and more than 11,900 customers above $100,000 of trailing revenue at 30 September 2026, up from more than 950 a year earlier, with more than 1,900 above $1 million and approximately 250 above $10 million; over 50% of the Fortune 500 and over 30% of the Global 2000 among them, Anthropic's revenue averaging less than 0.1% of those Fortune 500 customers' total expenses; revenue through cloud service provider marketplaces of 11% (2023), 32% (2024), 47% (2025), 44% (H1 2025) and 48% (H1 2026); $20,000M, $15,000M and $42,000M of undrawn committed note purchase agreements with Google, Amazon and an infrastructure partner; non-cancelable purchase commitments of $54,559M at 31 December 2025 rising to approximately $265.6 billion at 30 June 2026 with terms of one to 20 years, plus leases not yet commenced of approximately $50.2 billion and $321.4 billion at those dates, and named commitments of about $161.2 billion of Broadcom equipment leases, up to $120.5 billion with SpaceX.AI LLC for NVIDIA GPU compute, at least about $114.5 billion with Google, at least $110.0 billion with Amazon, up to about $44.6 billion with Nscale and at least $44.9 billion with Microsoft; a $1.5 billion Bartz copyright settlement approved by the district court in July 2026; a September 2026 Sherman Act class action alleging the frontier developers agreed to slow the pace of model improvement; a Department of War supply-chain risk designation under Section 4713 upheld 2-1 by the D.C. Circuit on 25 September 2026 with a petition for rehearing en banc pending, and June 2026 Commerce export restrictions that led Anthropic to disable Fable 5 and Mythos 5 for every customer; over 90% of contributions to its own codebase written by Claude in September 2026; one share of Class T common stock electing a majority of the board, Class A voting power capped at 49.9%, and Amazon and Google each holding more than five percent of capital stock while appearing in no row of the beneficial-ownership table, which covers voting securities only; and the statement that prior to the offering there has been no public market for the Class A common stock - the operating metrics and their definitions and limitations. — 2023 to 30 September 2026 · publ. 26 October 2026 · source ↗
Sources
Generated October 26, 2026