Baseten raises $1.5bn Series F for AI platform
Baseten secures $1.5bn in a Series F round, boosting its AI inference platform as companies seek cheaper, higher‑performing models.
Funding details and investors
The California‑based startup announced that the $1.5 billion raise was split into two tranches, valuing the firm at $13 billion and $11 billion respectively. The lead investors were Altimeter Capital, Conviction and Spark Capital, with Sands Capital and Wellington Management acting as co‑leads. Additional capital came from IVP, 01A, Greylock, Durable Capital Partners, Blackbird, Verified Capital, Battery Ventures and D. E. Shaw Ventures, alongside existing shareholders.
Growth metrics and platform reach
Baseten said its revenue grew roughly twentyfold year‑over‑year. The platform now handles more than one billion inference calls daily, spread across 87 clusters in 18 cloud providers. This multi‑cloud architecture is described as a core part of its service.
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According to the company, leading application‑layer firms allocate 30 % to 50 % of model spending to customized and post‑trained models. It claims that post‑trained open‑source models deliver comparable performance at lower cost, a trend it sees accelerating as closed‑source and open‑source offerings converge.
CEO perspective
CEO and co‑founder Tuhin Srivastava said the future of AI will rest on “millions of specialised models” and that post‑training has become “existential” for firms that need to own data and tailor intelligence for their customers. He added that companies closing this loop quickly are using Baseten to build systems that increase in value over time.
Baseten aims to dominate inference services.
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Investor comments
Altimeter Capital partner Apoorv Agrawal noted that the inference market is “compounding faster than almost anything we’ve seen” and that sophisticated AI firms are standardizing on Baseten’s infrastructure. He highlighted the company’s rapid growth and the trust it has earned from customers.
Use of new capital
The fresh funds will support hiring, computing capacity and the rollout of enterprise‑focused strategies. Baseten plans to triple its workforce this year, with a focus on engineering, research, operations and go‑to‑market roles.
Industry context
Analysts observe that the surge in demand for inference services reflects broader shifts in AI economics. As models become more specialized, organizations look for platforms that can manage diverse workloads without locking into a single vendor. AI inference is increasingly viewed as a separate value chain from training, prompting firms like Baseten to position themselves as infrastructure providers.
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Outside perspective
Independent market research firm Gartner recently highlighted the growing importance of multi‑model strategies, noting that enterprises are blending frontier models with customized versions to meet specific regulatory and performance needs. While Baseten’s numbers are impressive, some commentators caution that the rapid expansion of inference workloads could strain cloud resources if pricing models do not evolve.
Recent financing history
Just months earlier, in January 2026, Baseten raised $300 million in a Series E round led by IVP, CapitalG and Nvidia, which placed a $5 billion valuation on the company. The latest round marks a significant jump in both capital and valuation, highlighting investor confidence in the platform’s role within the AI ecosystem.
Overall, Baseten’s growth trajectory and the scale of its new financing suggest that the company is positioning itself as a backbone for the next generation of AI applications, even as the market wrestles with the balance between open‑source flexibility and proprietary performance.
