Analysis
Baseten, the AI inference infrastructure startup, is reportedly in talks to raise about $2 billion in a new funding round led by returning investor Sands Capital, with separate tranches valuing the company at $26 billion and $30 billion, according to a Bloomberg report relayed by StrictlyVC.
If the higher figure holds, it would more than double the $13 billion valuation Baseten set just over four months ago.
What Baseten does
Baseten builds software and multi-cloud compute infrastructure that helps companies optimize, customize and run open-source AI models at inference time -- the step where a trained model actually responds to a prompt, rather than where it's trained. Its customers include Cursor, Mercor and OpenEvidence, according to a KuCoin News report on its last round. The San Francisco company is seven years old, putting its founding around 2019, well before the current inference boom made its core business a venture priority.
“If the higher figure holds, it would more than double the $13 billion valuation Baseten set just over four months ago.”
Baseten's funding history
Baseten's valuation has climbed in stair-step fashion through 2026:
- January 2026 -- raised $300 million at a $5 billion valuation.
- June 18, 2026 -- closed a $1.5 billion round, co-led by Altimeter Capital, Conviction, Spark Capital, Sands Capital and Wellington Management, with some investors coming in at an $11 billion valuation and others at $13 billion, per KuCoin's reporting (Pulse covered it at the time).
- September 2026 -- reports floated the company in talks at around $26 billion.
- This week -- StrictlyVC reports tranches as high as $30 billion.
If the new round closes at the top of that range, Baseten's valuation will have risen roughly 6x in ten months and more than doubled since June alone.
Who's reportedly behind the new round
Sands Capital, which co-led the $1.5 billion Series F, is reported to be leading the new raise as well -- a sign that at least one existing backer is pressing its bet rather than waiting for a markup from the sidelines. Altimeter, Conviction, Spark Capital and Wellington Management, the company's other Series F backers, aren't named in the reporting on this round; Baseten has not announced the financing publicly, and the terms reported by Bloomberg and relayed by StrictlyVC could still change before any close.
Industry context: AI inference is the new line item
Inference spending -- the compute cost of actually running trained models -- has become one of the fastest-growing line items in enterprise AI budgets, and Baseten is competing with both hyperscaler-native inference products and well-funded rivals like Fireworks AI and Together AI. Rising valuations for infrastructure-layer AI companies have continued even as compute-heavy model labs face their own financing strain: OpenAI has cut its own fundraising target this same week, while Anthropic faces a possible junk credit rating ahead of its IPO. That split -- infrastructure plays still commanding premium multiples while frontier labs face tighter terms -- is becoming one of the clearer fault lines in AI venture capital heading into 2027.
The open question
Baseten has not confirmed the round, and the reported $26 billion-to-$30 billion range likely reflects a split structure similar to its last raise, where early and late closers got different prices. Whether Sands Capital's stake actually grows at the price reported remains to be seen, and the bigger risk is whether Baseten's revenue has grown as fast as its valuation -- a 2x markup on unchanged unit economics is a repricing, not new value creation, and neither Bloomberg nor StrictlyVC has disclosed revenue figures to settle which this is.