--- title: "Replit's exit from Anthropic's top five lands the same week Anthropic asks the market for $750 billion" description: "Amjad Masad says Replit was a top-five Anthropic customer until it moved its default to OpenAI this week. Anthropic's S-1, out the same week, asks public buyers to fund up to $750 billion of compute on a two-customer concentration story." publisher: "The Inference" section: "Markets" published: 2026-10-21T14:48:50.175Z modified: 2026-10-21T14:48:50.175Z canonical: https://theinference.org/article/replit-s-exit-from-anthropic-s-top-five-lands-the-same-week-anthropic-asks-the-market-for-750-billion language: en keywords: "Anthropic, Replit, OpenAI, IPO, Compute" --- # Replit's exit from Anthropic's top five lands the same week Anthropic asks the market for $750 billion > Amjad Masad says Replit was a top-five Anthropic customer until it moved its default to OpenAI this week. Anthropic's S-1, out the same week, asks public buyers to fund up to $750 billion of compute on a two-customer concentration story. Amjad Masad stood on the TechCrunch Disrupt stage on October 16 and said the quiet part loud: [Replit](https://theinference.org/markets/companies/replit), the browser-based coding platform where users build and deploy apps, [was no longer working with Anthropic](https://www.businessghana.com/site/news/technology/358034/Replit-makes-OpenAI-its-default-over-Anthropic,-CEO-says) [1]. Replit had been, until recently, one of [Anthropic](https://theinference.org/markets/companies/anthropic)'s top five customers, he said [1]. Three days later in the same week, [Anthropic's draft S-1 landed, asking public buyers to fund compute commitments that could reach $750 billion](https://cryptobriefing.com/anthropic-h1-revenue-exceeds-compute-costs/) [3][6]. ## The default seat is the whole business Masad cited cost, performance and partnership. "I think ChatGPT is better now," he said, pointing to internal and public benchmarks where [OpenAI](https://theinference.org/markets/companies/openai)'s Sol and Astra beat Claude at building apps from scratch [1]. Replit struck its OpenAI partnership in August 2026, and OpenAI is now the default model powering Replit Agent, Claude still selectable [1][4]. The company later walked back the "no longer working with" line: Replit remains model agnostic, and [insiders told TechCrunch the Anthropic partnership is still in place](https://www.msn.com/en-us/news/other/replit-is-no-longer-working-with-anthropic-ceo-says/ar-AA2epuBn) [1][4]. That walkback misses the point. Most customers stick with the default rather than choosing a model, so the default captures the routine spend [1][2]. A top-five account just moved its heaviest traffic to a rival with one configuration change, without breaking any contract. ## The mix that explains the timing The same interview carries numbers nobody has run as a money story. Enterprise was 2% of Replit's revenue last year; it is about 15% this year, and more than half of revenue is B2B [1][5]. Masad expects enterprise and government to pass half of revenue in 2027 [1][5]. *Chart: **Enterprise has gone from a rounding error to the growth engine of Replit's revenue** Column chart showing enterprise share of Replit revenue rising from 2 percent last year to about 15 percent this year, with an expected more-than-half in 2027.* *Enterprise share of Replit revenue. Last year about 2%, this year about 15%; Masad expects enterprise and government to pass half of revenue in 2027. Sources: TechCrunch Disrupt interview via BusinessGhana; TechRepublic. [1][5]* Enterprise buyers, and the contracts that come with them, decide which model sits in the default seat and whose spend sits in Replit's cost base. The switch lands the same week that mix crossed its inflection. [A prior Inference piece covered Replit's cost pressure after its storage bill arrived first](https://theinference.org/article/replit-promised-a-1-billion-year-the-storage-bill-arrived-first); what is new here is the customer mix behind the move [1]. ## What it costs Anthropic in public [Anthropic's draft S-1 shows $16.3 billion of first-half revenue, up from $1.1 billion a year earlier, and an $80.7 billion loss](https://moneycheck.com/anthropic-s-1-filing-shows-80-7-billion-net-loss-for-first-half-of-2026/), of which about $72 billion is a non-cash accounting charge on convertible notes [6][7]. Around 20 to 25% of first-half revenue came from just two unnamed customers, and the filing expects concentration to persist [6][7]. *Chart: **Anthropic's first-half revenue multiplied fifteenfold, but the loss dwarfs it** Column chart comparing Anthropic first-half revenue of $1.1 billion in 2025 with $16.3 billion in 2026, alongside an $80.7 billion first-half 2026 net loss.* *Anthropic first-half revenue and net loss. About $72 billion of the H1 2026 loss is a non-cash accounting charge on convertible notes. Sources: Crypto Briefing and MoneyCheck, from the draft S-1. [6][7]* [Compute and cloud commitments exceed $600 billion, including $111 billion with Google and $110 billion with AWS, potentially $750 billion](https://coincentral.com/anthropic-ipo-filing-reveals-80-billion-loss-and-600-billion-in-computing-bills/) [6][7][8]. Anthropic is expected to list in November at a valuation investors are weighing near $1.5 trillion [7][8]. Its own filing says cloud partners increasingly see it as a competitor and declined to supply all the capacity it sought [7][8]. *Chart: **Two named cloud deals are a small slice of commitments that could reach $750 billion** Column chart showing Anthropic's $111 billion Google and $110 billion AWS commitments against more than $600 billion of total commitments and a potential $750 billion maximum.* *Anthropic compute and cloud commitments. Total commitments exceed $600 billion and include partners beyond the two named here; the filing indicates the figure could reach $750 billion. Sources: Crypto Briefing, MoneyCheck, CoinCentral, from the draft S-1. [6][7][8]* Masad's headline line, "they were a better partner for now", carries a message Anthropic's S-1 does not print: frontier-model spend is conditional [1]. The two-customer concentration is disclosed. What no document shows is whether any large customer, Replit's size or larger, is negotiating its way off the platforms that fund those $600 billion commitments [1]. ## What to watch Whether Replit publishes the benchmark scores behind "better now", whether Anthropic's roadshow pricing absorbs the default-loss story, and whether the S-1's two unnamed customers are still two when the prospectus goes final. Read more below for the full record behind these numbers. ## Takeaway Replit's quiet move of its default model to OpenAI removes a top-five Anthropic account the same week the S-1 asks public buyers to fund up to $750 billion of compute against two-customer revenue concentration; the default seat, not the contract, is where frontier spend is decided. ## Sources 1. [BusinessGhana, Replit makes OpenAI its default over Anthropic, CEO says, 20 October 2026](https://www.businessghana.com/site/news/technology/358034/Replit-makes-OpenAI-its-default-over-Anthropic,-CEO-says) 2. [Lapaas Voice, Replit Makes OpenAI Its Default AI Provider, Shifting From Anthropic, 20 October 2026](https://lapaasvoice.com/replit-makes-openai-its-default-ai-provider-shifting-from-anthropic/) 3. [Dealroom, Replika founder launches Wabi, a $20M bet on shared AI assistants, 21 October 2026 (sidebar: Anthropic's draft S-1 reveals $16.3B revenue, $80.7B loss and up to $750B compute bill)](https://dealroom.co/news/164235-replika-founder-launches-wabi-a-20m-bet-on-shared-ai-assistants/) 4. [TechCrunch via MSN, Replit is no longer working with Anthropic, CEO says, 16-17 October 2026](https://www.msn.com/en-us/news/other/replit-is-no-longer-working-with-anthropic-ceo-says/ar-AA2epuBn) 5. [TechRepublic, Replit CEO Says ChatGPT Is Better Now, but Anthropic Isn't Out, 20 October 2026](https://www.techrepublic.com/article/news-replit-openai-preferred-ai-partner-anthropic/) 6. [Crypto Briefing, Anthropic's first-half revenue outpaces its compute bill, according to draft IPO filing, 20 October 2026](https://cryptobriefing.com/anthropic-h1-revenue-exceeds-compute-costs/) 7. [MoneyCheck, Anthropic S-1 Filing Shows $80.7 Billion Net Loss for First Half of 2026, 21 October 2026](https://moneycheck.com/anthropic-s-1-filing-shows-80-7-billion-net-loss-for-first-half-of-2026/) 8. [CoinCentral, Anthropic IPO Filing Reveals $80 Billion Loss and $600 Billion in Computing Bills, 21 October 2026](https://coincentral.com/anthropic-ipo-filing-reveals-80-billion-loss-and-600-billion-in-computing-bills/) --- Replit's exit from Anthropic's top five lands the same week Anthropic asks the market for $750 billion — The Inference. Canonical: https://theinference.org/article/replit-s-exit-from-anthropic-s-top-five-lands-the-same-week-anthropic-asks-the-market-for-750-billion