en.Wedoany.com Reported - Baseten, a California-based AI training and inference platform, has raised $1.5 billion in a Series F funding round, with the company valued at $13 billion and $11 billion, respectively. The round was completed in two tranches, led by Altimeter Capital, Conviction, and Spark Capital, with Sands Capital and Wellington Management participating as co-lead investors.
Other investors include IVP, 01A, Greylock, Durable Capital Partners, Blackbird, Verified Capital, Battery Ventures, and D. E. Shaw Ventures, along with existing shareholders. This funding follows Baseten's $300 million Series E round in January 2026, led by anchor investors IVP, CapitalG, and Nvidia, which valued the company at $5 billion.
Baseten stated that the new capital in the Series F reflects sustained demand for inference capabilities at the application layer, as closed-source and open-source models increasingly converge in performance, cost, and customization. As AI-related economics evolve, Baseten noted that post-trained open-source models are delivering high-level performance at lower costs. According to the company, leading application-layer firms now allocate 30% to 50% of their model spending to customization and post-trained models.
The Baseten platform supports organizations in adopting a multi-model approach, including the use of frontier models and customized post-trained models across various workflows and use cases. The company's business metrics have expanded significantly, indicating approximately 20x year-over-year revenue growth. The platform now processes over 1 billion inference calls daily, running across 87 clusters globally, spanning 18 cloud providers. Baseten describes its multi-cloud infrastructure as a key element of its product.
Tuhin Srivastava, CEO and co-founder of Baseten, stated that the future of AI will be built on millions of specialized models, and companies building the best models know that post-training has become critical for survival. The new funds will be used for hiring, computing resources, and advancing the company's enterprise strategy. Baseten plans to triple its headcount this year, with hiring focused on engineering, research, operations, and go-to-market teams.
Apoorv Agrawal, partner at Altimeter Capital, noted that the inference market is growing faster than almost anything else, and some of the world's most sophisticated AI companies are standardizing on Baseten to power it.
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