River AI raised $1.1bn to let companies train and keep their own models
TL;DR
River AI raised $1.1bn led by General Catalyst and AMP PBC. NVIDIA and AMD Ventures took strategic stakes, Y Combinator and Temasek joined. Founded by xAI co-founder Igor Babuschkin, incorporated in Nevada in April. Sells fine-tuning and reinforcement learning on open weight models. No valuation disclosed.
River AI has raised $1.1bn, roughly four months after the company was incorporated. General Catalyst and AMP PBC led the round, with strategic investment from NVIDIA and AMD Ventures, and further money from Y Combinator and Temasek. The Palo Alto company was founded by Igor Babuschkin, a co-founder of xAI.
The pitch is that companies should train and own models rather than rent general-purpose ones. River sells an API for LoRA fine-tuning and reinforcement learning on frontier open weight models, taking on the infrastructure underneath, including weight transfers, sampling-training consistency and elastic compute.
Its performance claims are its own and have not been...
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