# Fluidstack AI cloud by Fluidstack Canonical page: https://technooptimist.io/computing/fluidstack-ai-cloud Frontier: [Computing](https://technooptimist.io/computing.md) · Field: AI clouds · Company: [Fluidstack](https://technooptimist.io/companies/fluidstack.md) Stage: Scaling (5 of 5: Research → Proto → Pilot → Deploy → Scaling) Updated: last update 2026-08-05, facts checked 2026-10-11 Goal: Give frontier AI labs their own large GPU clusters within months instead of years, by pairing ready power sites with factory-built data halls and running the machines for them. Status: 102 MW live at Lake Mariner (July 2026); Anthropic sites powering up through 2026. Next milestone: Anthropic Texas and New York sites online, target 2026 ## Milestones | Status | Milestone | Date | Slip | | --- | --- | --- | --- | | Done | Founded at Oxford University | 2017 | | | Done | France MoU: 1 GW AI supercomputer, €10B first phase | Feb 2025 | | | Done | TeraWulf Lake Mariner leases: 200+ MW, Google backstop | 14 Aug 2025 | | | Done | Lake Mariner expanded to about 360 MW (CB-5) | 18 Aug 2025 | | | Done | Chosen to build Anthropic's $50B US data centres | 12 Nov 2025 | | | Done | $830M Series A at $7.5B | Jan 2026 | | | Current | Anthropic Texas and New York sites online | 2026 | | | Planned | Lake Mariner CB-5 phased delivery | Q1 2027 | +12 mo (originally 2026) | ## Upcoming events - **2026**: Anthropic Texas and New York sites online - **Q1 2027**: Lake Mariner CB-5 phased delivery (slipped 12 mo) ## Most important updates - **5 Aug 2026**: TeraWulf completes CB-3 for Fluidstack, bringing Lake Mariner to 102 MW; CB-5 moves to early 2027. TeraWulf finished delivering the CB-3 building in early July 2026, lifting revenue-generating capacity at Lake Mariner to 102 MW and activating $600M of Google's credit support for Fluidstack's lease. ([our story](https://technooptimist.io/stories/terawulf-completes-cb-3-for-fluidstack-bringing-lake-mariner-to-102-mw-1d62369d.md) · [original source](https://www.stocktitan.net/news/WULF/tera-wulf-reports-second-quarter-2026-xroiqofrgahk.html)) - **20 Jul 2026**: Fluidstack confirms $830M Series A at a $7.5B valuation, led by Situational Awareness. Fluidstack disclosed an $830M Series A closed in January at a $7.5B valuation, led by Situational Awareness. ([our story](https://technooptimist.io/stories/fluidstack-confirms-830m-series-a-at-a-7-5b-valuation-led-by-5735c2e9.md) · [original source](https://siliconangle.com/2026/07/21/ai-data-center-builder-fluidstack-raises-830m-7-5b-valuation/)) - **12 Nov 2025**: Anthropic picks Fluidstack to build custom data centres in Texas and New York in a $50B plan. Anthropic said it will spend $50B building its own AI data centres with Fluidstack, starting with sites in Texas and New York that power up through 2026. ([our story](https://technooptimist.io/stories/anthropic-picks-fluidstack-to-build-custom-data-centres-in-texas-and-cc7435a1.md) · [original source](https://www.constellationr.com/insights/news/anthropic-spend-50-billion-ai-infrastructure-fluidstack-partnership)) - **14 Aug 2025**: TeraWulf leases 200+ MW to Fluidstack at Lake Mariner, with Google backstopping $1.8B. TeraWulf signed two 10-year colocation agreements with Fluidstack for over 200 MW of critical IT load at its Lake Mariner campus in western New York, worth about $3.7B. ([our story](https://technooptimist.io/stories/terawulf-leases-200-mw-to-fluidstack-at-lake-mariner-with-google-c31da6b3.md) · [original source](https://www.sec.gov/Archives/edgar/data/1083301/000110465925078084/tm2523008d2_ex99-1.htm)) - **Feb 2025**: Fluidstack signs MoU with France for a 1 GW nuclear-powered AI supercomputer, €10B first phase. At the AI Action Summit in Paris, Fluidstack signed a memorandum with the French government for an AI supercomputer of 1 GW, powered by France's mostly nuclear grid. ([our story](https://technooptimist.io/stories/fluidstack-signs-mou-with-france-for-a-1-gw-nuclear-powered-ai-c0b2cf91.md) · [original source](https://bebeez.eu/2025/02/18/gpu-cloud-provider-fluidstack-signs-mou-for-1gw-ai-supercomputer-in-france/)) ## Current obstacles - **Construction slips**: Lake Mariner's CB-3 went live in July 2026, later than first guided, and CB-5 moved from H2 2026 to early 2027. - **Financing at gigawatt scale**: Each MW costs $8-10M to build at Lake Mariner; scaling to gigawatts needs partners' balance sheets and guarantees. ## Physics limits - **Grid power is the bottleneck**: A gigawatt campus draws as much as a large city. New transmission lines and power plants take years, far longer than building the halls. - **Heat density keeps rising**: Each GPU generation packs more watts per rack, pushing cooling from air to liquid and forcing halls to be redesigned as chips change. ## How it works ### Site: Start where the power is Fluidstack leases campuses that already have big grid connections, like former bitcoin mines, since power is the slowest thing to secure. ### Finance: Big tech backs the lease At Lake Mariner Google guarantees part of Fluidstack's rent, which lets the landlord borrow to build the halls. ### Build: Halls from a factory Power, cooling and rack modules are prefabricated and assembled on site, with robot cells planned for welding and painting. ### Run: Operated for one lab Each cluster is dedicated to one customer and managed by Fluidstack's software, unlike a shared public cloud. ## Spec sheet | Spec | Fluidstack AI cloud | Provenance | | --- | --- | --- | | Valuation (Jan 2026) | $7.5B | reported | | GPUs under management (Feb 2025) | Over 100,000 | reported | | Contracted at Lake Mariner, NY | About 360 MW critical IT | reported | | Google lease backstop | About $3.2B | reported | | First 200 MW lease value (10 yr) | About $3.7B | reported | | Target build time | About six months | reported | Provenance: reported = stated by the company; estimated = our estimate; sample = a sample figure. ## About Fluidstack Fluidstack, founded at Oxford University in 2017, builds and runs GPU clusters for AI labs. It is Anthropic's partner for a $50B US data-centre build-out and leases large campuses such as TeraWulf's Lake Mariner, backed by Google. - Builds Anthropic's custom data centres in Texas and New York, part of a $50B plan; first sites online during 2026. - Raised $830M Series A at $7.5B in Jan 2026, led by Situational Awareness. - Leases about 360 MW at Lake Mariner, NY; Google backstops $3.2B of the lease obligations. - Founded: 2017 - Headquarters: GB - Status: private - Valuation: $7.5B (private valuation, 2026-01) - Raised: $830M - Last round: Series A $830M, Jan 2026, led by Situational Awareness - Website: https://www.fluidstack.io - People: Gary Wu (CEO); César Maklary (Co-founder & President) - Partners, customers, investors: Anthropic (customer); TeraWulf (supplier); Google (partner); Mistral AI (customer) Company page: https://technooptimist.io/companies/fluidstack.md ## Related programs Everything in Computing: https://technooptimist.io/computing.md --- The Techno Optimist tracks every frontier of technology, program by program: https://technooptimist.io/ (a Markdown version of any page: add .md to its URL; site map for agents: https://technooptimist.io/llms.txt). 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