AI inference provider Baseten closed a $1.5 billion Series F at a $13 billion valuation, the largest funding round of the week, led by Altimeter Capital and Conviction Partners with Spark, Sands and Wellington participating. The raise underscores how serving AI models -- not just training them -- has become one of the most valuable and capital-intensive layers of the stack.
Jun 26, 2026AI inference software provider Baseten raised a $1.5 billion Series F at roughly a $13 billion valuation -- its fourth fundraise in 18 months and the largest US venture round of the week. The company sells the systems software that lets enterprises run AI workloads efficiently, riding the shift in AI spending from one-time training to perpetual, usage-based inference.
Jun 25, 2026AI inference platform Baseten is reportedly raising roughly $1.5 billion at a valuation of up to $13 billion -- tripling its mark in about five months -- co-led by Spark Capital, Sands Capital, Altimeter and Wellington. The round captures investors racing into the layer that actually serves AI models in production, where Baseten's ARR has reportedly jumped from $200M to $600M.
Jun 18, 2026