Building @river_ai_inc | prev @xAI Human self actualization
Joined February 2023
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Alex Chen retweeted
We just shipped something pretty unique among post-training API providers: end-to-end custom losses.
The objective you define locally gets traced into a graph, compiled and executed efficiently on our GPUs.
Read more about the engineering behind it in our latest blog post.
Custom losses are now live on the River API.
Write your objective in PyTorch. Our Symbolic Engine compiles and runs it end-to-end across GPUs, handling efficient execution and memory usage.
Learn more and see it in action with decision models and score centering: river.ai/custom-losses
Alex Chen retweeted
We've partnered with @NVIDIAAI to make Nemotron 3.5 Super VL available on the River API from day zero.
Even before training, Super VL outperforms Kimi K2.6 on our text-to-SQL evaluation, despite being a fraction of its size. After training with our text-to-SQL recipe on River, it outperformed every proprietary model we evaluated.
These results show what's possible with River: frontier-level performance on a specialized task, using a model small enough to deploy on your own hardware.
Alex Chen retweeted
We’re launching River AI, a new AI company with the mission to build AI systems that are owned and shaped by you. I’m extremely excited about what we’re going to ship soon. Check it out!
We are incredibly excited to announce River AI. Our mission is to create personal AI that is owned and shaped by you.
Today’s best AIs are controlled by a few large corporations. We are building the alternative: a new, personal stack for AI that works entirely for you, shares your values, and operates on your terms.