Anthropic gave up about $600 million of third-quarter revenue to price cuts, according to its amended Form S-1 filed with the SEC on Monday, 2 November. The filing says that from the second to the third quarter of 2026, “the increase in revenue due to higher usage was partially offset by a decrease of approximately $600 million from price reductions introduced as part of new model versions and contractual discounts”.
Third-quarter revenue was $16,956 million in the filing’s quarterly table, so the $600 million equals about 3.5% of the quarter, by our arithmetic.
What Anthropic’s S-1/A says new models and discounts took off, by measure: Opus 5.5 cost per task about 40% lower than Opus 5; Fable 5.1 typical workloads about 25% cheaper than Fable 5; revenue given up to price reductions about 3.5% of Q3 2026 and 3.4% of Q4 2025 revenue. Revenue shares are our arithmetic. Source: Anthropic PBC, Form S-1/A, 2 Nov 2026. Chart: FourWeekMBA.
The key insight: Anthropic’s amended S-1 says price reductions took about $600 million off revenue from the second to the third quarter of 2026, against about $70 million from the third to the fourth quarter of 2025; by our arithmetic both equal roughly 3.5% of the quarter’s revenue.
The same passage gives one earlier figure. From the third to the fourth quarter of 2025, the filing says, the usage-driven increase in revenue was “partially offset by a decrease of approximately $70 million from price reductions introduced as part of new model versions and contractual discounts”.
It adds: “Price changes did not have a material impact on the other quarterly revenue trends presented”. The two disclosed figures are therefore the only quarters in the table where the company says price cuts mattered.
By our arithmetic, the third-quarter 2026 figure is about 8.6 times the fourth-quarter 2025 one. Measured against each quarter’s revenue, the two are almost the same size: about $70 million of $2,040 million is 3.4%, and about $600 million of $16,956 million is 3.5%.
Revenue Anthropic says it gave up to price reductions from new model versions and contractual discounts: about $70 million from the third to the fourth quarter of 2025 and about $600 million from the second to the third quarter of 2026. The filing says price changes had no material impact on the other quarterly trends. The 8.6-times ratio and the shares of revenue are our arithmetic. Source: Anthropic PBC, Form S-1/A, 2 Nov 2026.
What Customers Pay per Task
The filing does not say which models the $600 million came from. In a separate passage on what customers pay per task, it says that “with the release of Fable 5.1 in September 2026, we reduced the cost of typical workloads by approximately 25% compared to Fable 5, with savings of up to 45% for complex coding and highly agentic tasks”.
It also says that with Opus 5.5 “we reduced customers’ cost per task by approximately 40% compared to Opus 5”, and that “In each case, the reduction was a combination of a lower price and improved efficiency, the contributions of which depend on the task”.
The company adds: “Because of our compute efficiency, we have been able to make these improvements while preserving our margins”.
The Cost Side
The same section of the filing says compute and infrastructure expenses as a percentage of revenue “increased to 58% for the three months ended September 30, 2026”, from 48% in the second quarter, “reflecting the delivery of additional compute”. It adds that this “includes $5.0 billion of compute under short-term commitments, which currently costs significantly more than comparable compute procured under our multi-year commitments”.
The quarter with the larger disclosed price-cut effect was also the quarter in which compute’s share of revenue rose, per the filing’s own figures.
As we read the filing, the two disclosures show price cuts growing in dollars with the business while holding steady as a share of revenue, at about 3.4% and 3.5%.
As we read it, the cuts and the cost side moved in the same quarter: the filing’s own figures put compute at 58% of revenue in the third quarter, up from 48%, including $5.0 billion of short-term compute that it says costs significantly more.
Anthropic’s amended Form S-1
“Because of our compute efficiency, we have been able to make these improvements while preserving our margins”
Three Implications
FOR CUSTOMERS The filing says Opus 5.5 cut customers’ cost per task by approximately 40% compared with Opus 5, through a mix of lower price and improved efficiency.
FOR INVESTORS The filing says price changes did not have a material impact on other quarterly revenue trends, so the about $600 million and about $70 million are the only two quarters it flags.
FOR RIVALS By our arithmetic, Anthropic gave up roughly 3.5% of a $16,956 million quarter to price cuts while revenue still rose from $11,555 million.
The framework says: “Token prices have fallen ~10ร per year for two years running.”
As we read it, Anthropic’s filing puts a dollar figure on one quarter of that decline for one lab: about $600 million of revenue given up. The framework is the owner’s argument and does not discuss this filing.
A Cost Test explained: what a lower price per task does to revenue and to cost.
What Is Not Established
The filing gives the price-cut effect only as approximate totals for two quarter-to-quarter changes and does not split it between new model versions and contractual discounts, or by product. It does not give the size of the usage-driven increase it says the cuts offset. The 3.4%, 3.5% and 8.6-times figures are our arithmetic.
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Anthropic’s amended S-1 says price reductions from new model versions and contractual discounts took about $600 million off revenue between the second and third quarters of 2026, against about $70 million between the third and fourth quarters of 2025. By our arithmetic both equal roughly 3.5% of the quarter’s revenue. Per the filing’s own figures, compute rose to 58% of revenue in the same third quarter.
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A note on sourcing. Figures and quotations are from Anthropic’s Form S-1/A filed with the SEC on 2 November 2026 (Quarterly Trends, the quarterly results table and the Business section). The shares of revenue and the 8.6-times ratio are our arithmetic.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
