AI inference startup Baseten is reportedly on the verge of closing a massive $1.5 billion funding round at a $13 billion valuation, according to a report from The Wall Street Journal. The new round comes just five months after the company announced a $300 million Series E at a $5 billion valuation, and nine months after a $150 million Series D.
The speed and scale of the fundraising are striking. If finalized, the new valuation would represent a 160% increase in less than six months. However, the Journal notes that this is a split-priced round, a tactic startups are increasingly using to boost their headline valuation. Under the reported terms, some investors are entering at a $13 billion valuation, while others are paying a lower price that values the company at $11 billion.
The details of the deal
The round is said to be co-led by Spark Capital, Sands Capital, Altimeter Capital, and Wellington Management. The use of a split structure allows the company to announce a headline number that signals market dominance, while giving certain investors a discount. Critics argue this practice can inflate a company’s perceived worth and mask underlying market sentiment.
Baseten, founded in 2019, operates in what venture capitalists have dubbed the “inference gold rush.” Inference is the process an AI model performs after a user submits a prompt — the moment the technology delivers a result. Baseten’s platform handles this process quickly while controlling costs by routing requests to the most efficient model for the task, often favoring competent, less-expensive open-source alternatives.
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Why this matters
The funding spree underscores a broader shift in AI investment. After years of pouring capital into training massive foundation models, VCs are now betting heavily on the infrastructure needed to run those models at scale. Baseten competes with other inference-focused companies like Fireworks AI and Together AI, all vying to become the default layer between AI models and the applications that use them.
The speed of Baseten’s fundraising — three rounds in roughly 14 months — also raises questions about market frothiness in the AI sector. While the company is benefiting from surging demand, the use of a split-priced round suggests that even high-flying startups may be encountering resistance at their desired valuations.
Frequently Asked Questions
What is AI inference?
AI inference is the process where a trained machine learning model makes a prediction or generates an output based on new input data. For example, when you ask a chatbot a question, inference is the step where the model generates the answer.
Who are Baseten’s main competitors?
Baseten competes with other AI inference infrastructure companies such as Fireworks AI, Together AI, and Replicate, as well as cloud giants like AWS, Google Cloud, and Microsoft Azure that offer their own inference services.
Is a $13 billion valuation realistic for Baseten?
The $13 billion valuation is the headline number, but the split-priced nature of the round means some investors valued the company at $11 billion. The true market valuation is likely somewhere in between, reflecting both strong demand for AI infrastructure and caution about inflated prices in the sector.
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