Rajko Radovanović
@rajko_rad
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AI/infra @a16z (partner to amazing teams eg @MistralAI @udiomusic @LumaLabsAI @cursor_ai @theworldlabs @braintrustdata) - alt @rajko_alt
San Francisco, California
Joined October 2011
Another banger by @ElanaPearl
New blog post: The bug that taught me more about PyTorch than years of using it started with a simple training loss plateau... ended up digging through optimizer states, memory layouts, kernel dispatch, and finally understanding how PyTorch works!
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If you are at COLM 2025 and interested in code gen, agents, reasoning and or infra, Reach out to join an @a16z x @cursor_ai luncheon tomorrow (Friday) near the conference Cc @chsrbrts @srush_nlp @StringChaos
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Personal Update: Excited to join a16z. I will be working with the infrastructure investing team and growth investing team to help amazing founders build the next generation of great companies.
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🚀 Excited to share that I’ve joined @a16z as a partner on the infrastructure team, where I’ll be investing in all things infra, data, and AI.
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Today, we're announcing our first hosted infrastructure product: pyx, a Python-native package registry. We think of pyx as an optimized backend for uv: it’s a package registry, but it also solves problems that go beyond the scope of a traditional "package registry".
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biggest gift to humanity any frontier lab could do is add a ton of uv examples in their posttraining mix 😁 save the people from python dependency management hell!!
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The ty weekly updates are getting so ridiculous. It's like: we implemented these three new core typing features, solved one critical design challenge, and made everything 20% faster.
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Cursor is now in your terminal! It’s an early beta. Access all models. Move easily between your CLI and editor.
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Today I’m debuting Parable. Successful companies make the impossible, inevitable. Their stories live long enough to become parables that inspire generations.
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Why aren’t models benchmarked on recall and tool selection instead of math
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. @cursor_ai with Opus 4.1 is pretty wild, for tasks on simpler CRUD apps, comes up with nicer designs and UX decisions, can interact w. a more complex codebase to understand what would make sense given the rest of the codebase. It's really impressive. Loops less too.
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A feeling that will never get old: opening up some documentation in the wild and seeing uv. This time, gpt-oss.
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Claude Opus 4.1 is available in Cursor! Let us know what you think.
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America needs to take open models more seriously. This summer the early lead in open model adoption of the US via Llama has been overtaken by Chinese models. With The American Truly Open Models (ATOM) Project we're looking to build support and express the urgency of this issue.
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