AI inference provider Baseten closed a $1.5 billion Series F round at a $13 billion valuation, marking its fourth fundraise in 18 months as artificial intelligence continues to dominate venture capital.

Altimeter Capital, Conviction Partners, Spark Capital, Sands Capital and Wellington Management co-led the financing for the San Francisco company, which provides systems software to run AI application workloads.

The round topped a week where eight of the ten largest US funding deals went to AI companies, underscoring the sector's continued grip on venture dollars.

AI infrastructure takes center stage

Groq followed with a $650 million round led by Infinitum and Disruptive, just six months after Nvidia hired away its founder and licensed its technology in an acquihire-type transaction. The San Francisco company builds AI inference cloud technology and infrastructure.

General Intuition, which develops foundational AI models based on gameplay, raised $320 million in Series A funding at a $2.3 billion valuation. Khosla Ventures led the New York company's round, with participation from Jeff Bezos and General Catalyst.

Frontier lab Mirendil secured $200 million in seed funding from Andreessen Horowitz and Kleiner Perkins, with Nvidia also backing the San Francisco company that builds AI R&D systems.

AI networking infrastructure startup Upscale AI raised $190 million in Series A extension funding, bringing total financing to $500 million at a $2 billion valuation. Premji Invest led the round for the Santa Clara company.

Digital marketing analytics provider AppsFlyer reportedly secured over $1 billion in Series E funding at a $2.7 billion valuation, with Unity, Meta, Moloco and Google among the backers.

Biotech rounds complete the top ten

Biotech claimed the remaining spots, with Ollin Biosciences raising $330 million in Series B funding for vision-threatening disease therapies. TCG Crossover and Arch Venture Partners led the Austin company's round.

Osanni Bio secured $190 million in Series B funding from Patient Square Capital for its ophthalmic therapeutics platform.

Government software provider Peregrine Technologies raised $250 million in Series D at a $6.8 billion valuation, while risk intelligence platform Quantifind closed $200 million in growth financing from Summit Partners.

The funding spree reflects continued investor appetite for AI infrastructure as companies race to build and deploy large-scale AI applications.