Summary
On July 16, 2026, Fireworks AI closed a $1.505 billion Series D at a $17.5 billion valuation, led by Atreides Management, Index Ventures, and TCV, with Nvidia and others participating. The raise coincides with Fireworks crossing $1 billion in annualized revenue, up fivefold year over year, while processing more than 40 trillion tokens per day, over 95% of them on open models specialized on customers' proprietary data.
What changed
Fireworks AI raised a $1.505B Series D at a $17.5B valuation to expand compute, grow engineering, and deepen cloud partnerships including Microsoft and Nvidia.
Why it matters
The round is a market signal that serving customized open-weight models is now a billion-dollar-revenue business, validating the thesis that enterprises want specialized, lower-cost models over frontier closed APIs. Fireworks' 40-trillion-tokens-per-day scale positions it as key inference infrastructure for the open-weight wave, and Nvidia's participation ties GPU supply to the open-model serving layer.
Evidence excerpt
Fireworks AI raised $1.505 billion in a Series D funding round ... valuing the company at $17.5 billion ... Fireworks crossing the $1 billion threshold in annualized revenue ... processes more than 40 trillion tokens per day ... More than 95% of those tokens come from models specialized on customers' proprietary data.