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Osmosis (YC W25)
47 posts
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Osmosis (YC W25)
@Osmosis_AI
Forward Deployed Reinforcement Learning
San Francisco
osmosis.ai
Joined December 2024
2
Following
748
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  • Pinned
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    Osmosis (YC W25)
    @Osmosis_AI
    Oct 15, 2025
    Osmosis is a platform for companies to fine-tune models that outperform foundation models with reinforcement learning. Better, faster, and cheaper. Learn more at osmosis.ai/contact
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  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Jun 12
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    Article
    Cutting Memory in Long-Context RL with Fused Logprobs
    TL;DR: We (@StaticSoul2) built a fused logprob kernel that reduces RL training time by 20% and increases maximum trainable context length by 33% (12K → 16K) on Qwen3.5-122B-A10B (single 8xH200 node +...
    21K
  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Jun 2
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    Article
    Training Thousands of LoRA Adapters At Once
    TL;DR: We (@matjha_latte, @artemsya) extended Miles with a multi-adapter LoRA training path that lets us train thousands of LoRA adapters concurrently and asynchronously. The core changes is a...
    33K
  • Osmosis (YC W25) reposted
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    Daytona
    @daytonaio
    Apr 22
    🚀 Next Wednesday, April 29, @daytonaio & @FounderCoHo are once again bringing together AI researchers at @Stanford for a high-signal evening focused on long-horizon, stateful agents, from infrastructure and RL pipelines to evaluation and benchmarking. 🎤 Speakers: •
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  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Apr 3
    We recently added LoRA RL support for Qwen3.5 MoE models like Qwen3.5-122B. The process involved merge conflicts, dependency issues, and a tricky race condition related to LoRA weight syncing. We wrote up a post that goes into more detail and shares our work - link below!
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  • Osmosis (YC W25) reposted
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    Shailee Sankhala
    @ShaileeSankhala
    Nov 15, 2025
    the people in this room went from students to founders, engineers, and researchers at the coolest AI startups right now: @reductoai, @ZeroEntropy_AI , @scale_AI, @encord_team, and more. ft. Evan Vogelbaum, @FHvilshoj, @brndnwll, Nicholas Pipitone, @BuildWithDuke, & @eimen0.
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  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Oct 28, 2025
    We brought together 200+ founders, researchers, and engineers on Saturday for RL IRL at @ycombinator HQ! At @Osmosis_AI, our belief is that RL is the missing piece for AI agents - so we had some friends share how they're applying RL today! 🧵of session recordings below:
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  • Osmosis (YC W25) reposted
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    jacky (:
    Tomo
    @Jackyhuang
    Oct 26, 2025
    Thank you all for coming to RL IRL @ycombinator!! 🫶🏻 I'm still in awe that we were able to pull this all together in < 1 month but this forum really validated to me just how bullish I am on big IRL events! (: more from us soon <3
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Oct 26, 2025
    Had an great time at @ycombinator HQ running RL IRL - YC was at max capacity! We wanted to focus on *applied* RL: how any company could use RL to improve agents, not just labs (i.e. what we do at @Osmosis_AI). Thank you to all the attendees, as well as our amazing co-hosts!
    17K
  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Oct 17, 2025
    Really love how the new @Osmosis_AI site turned out! We wanted to bring RL concepts into the design - @nencreative @sarahqxi @reallynaise did an amazing job:
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  • Osmosis (YC W25) reposted
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    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Oct 24, 2025
    Back in the arena (@ycombinator HQ) RL IRL tomorrow 🫡
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  • Osmosis (YC W25) reposted
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    Michael
    @michael_chomsky
    Oct 26, 2025
    I grew up in sf. I went to Cal, and have lived in sf my entire life. I’ve gone to over a hundred tech events, and have organized a few myself. RL IRL was the best tech event I have ever gone to, by far. Kudos to @adelwu_ and all the organizers and speakers.
    28K
  • Osmosis (YC W25) reposted
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    adel 🌟
    Reducto
    @adelwu_
    Oct 25, 2025
    first time at @ycombinator for RL IRL today!! 🤩
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    29K
  • Osmosis (YC W25) reposted
    user avatar
    Kasey Zhang
    Osmosis (YC W25)
    @_WEEXIAO
    Oct 26, 2025
    Had an great time at @ycombinator HQ running RL IRL - YC was at max capacity! We wanted to focus on *applied* RL: how any company could use RL to improve agents, not just labs (i.e. what we do at @Osmosis_AI). Thank you to all the attendees, as well as our amazing co-hosts!
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    98K

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