Originally published on AI Tech Connect.
What builders need to know The round: Fireworks AI closed a $1.505B Series D at a $17.5B valuation, announced on 16 July 2026 and led by Atreides Management, Index Ventures and TCV, with NVIDIA among the strategic backers. The thesis: money is flowing towards "specialised intelligence" — taking open models, fine-tuning them on proprietary data, and serving them on a fast inference stack, rather than only calling a frontier API. The traction: Fireworks has passed a $1B annualised revenue run rate, up roughly fivefold year on year, and now serves more than 40 trillion tokens a day — with over 95% coming from customer-specialised models. The skills shift: this rewards fine-tuning (LoRA and QLoRA), eval-driven tuning and inference optimisation — not just prompt engineering against a hosted…
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