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Guido Appenzeller
a16z
3,599 posts
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Guido Appenzeller
a16z
@appenz
At a16z investing in AI & Infra. 2x founder & CEO. CTO at Intel & VMware. CPO at Yubico. Tweets are my own.
Silicon Valley, CA
guido.appenzeller.net
Joined January 2008
281
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10K
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  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 20, 2023
    1/7 Spent the week-end with ControlNet, a new approach to have precise, fine-grained control over image generation with diffusion models. It's huge step forward and will change a number of industries. Here is an example.
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    909K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Oct 9, 2025
    🚨New Content: The Trillion Dollar AI Software Development Stack It will generate massive value, spawn hundreds of start-ups and has created the fastest growing companies in history. @stuffyokodraws and I did a deep-dive on market, start-ups and the evolving stack. ⬇️
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    124K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Apr 16, 2024
    About 15% of all Stanford undergrads (of all majors) are learning how to build LLMs. Stats for @chrmanning's CS224N Natural Language Processing with Deep Learning below. That makes sense. LLM's are becoming a basic systems component like compute, networking and storage.
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    187K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Sep 21, 2023
    🔥 In a recent post Sequoia's @DavidCahn6 argues AI infra is overbuilt: - NVIDIA GPU revenue is $50b/y - This requires $200b in "AI revenue" - There is only $75b in "AI revenue" Thus there is a $125b hole I strongly disagree. AI Infra will be huge. Grab🍿and read on (🧵1/7).
    125K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 20, 2023
    Replying to @appenz
    6/7 If you want to try this out, it's realtively easy to get running if you have a Windows PC with a high-end Graphics Card (12 GB RAM is ideal, but less works too). I used the Automatic1111 extension here.
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    GitHub - Mikubill/sd-webui-controlnet: WebUI extension for ControlNet
    From github.com
    36K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Jan 27, 2021
    I am excited to announce that I am joining @Intel as CTO of the Data Platforms Group. Intel is not without challenges. But I think strength in CPUs, a diverse portfolio, massive scale and Navin’s great team will make it successful. And it's awesome to work with @PGelsinger again!
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  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Apr 27, 2023
    1/5 For companies doing Generative AI, finding enough GPUs is a difficult and expensive. We’ve seen companies spend 80%+ of total capital raised on compute resources. To help them @casado, @BornsteinMatt and I wrote a post how to navigate the cost of AI.
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    Navigating the High Cost of AI Compute | Andreessen Horowitz
    From a16z.com
    80K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Aug 16, 2024
    1/6 I fine-tuned a @bfl_ml's Flux.1-dev LoRA on myself. It fine tunes really well, easier than SDXL although not quite as easy as SD 1.5. Tuning was done on @replicate, the model hosted on @huggingface. Total cost is about $7 for 75 minutes on an A100. Full instructions below.
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    34K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 20, 2023
    Replying to @appenz
    2/7 The basic idea of control net is that your diffusion model works in tandem with a second model trained on a specific task. This is the sd15_scribble model. It helps Stable Diffusion 1.5 to interpret sketches, and turns my "sketch" of an Owl into an awesome drawing.
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    42K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 20, 2023
    Replying to @appenz
    7/7 Congrats to Lvmin Zhang and Maneesh Agrawala @magrawala at Stanford for developing this technology, the original research publication is here.
    arXiv logo
    arxiv.org
    Adding Conditional Control to Text-to-Image Diffusion Models
    We present ControlNet, a neural network architecture to add spatial conditioning controls to large, pretrained text-to-image diffusion models. ControlNet locks the production-ready large diffusion...
    32K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Aug 28, 2024
    1/3 New benchmarks from @MLPerf , and they include the first good B200 numbers that I have seen. 11,264 tokens/s for Llama 2 70b is crazy, and about 3.7x the performance of the H100🤯 The bar for every AI silicon start-up out there just went up. Some thoughts below.
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    42K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 27, 2023
    1/8 I created a picture of three robots posing to spell the letters "AI". A month ago creating this would have taken me days, this week-end it took me 15 minutes. Below an overview of ControlNet and OpenPose. Safe to say this will change image generation forever.
    Three robots posing to spell the letters "A" and "I".
    66K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Feb 20, 2023
    Replying to @appenz
    5/7 And last but not least, ControlNet combines with fine-tuning via DreamBooth. I can fine-tune a model on myself (like in the James Bond picture), and then use it to render myself into a specific scene. Here is our daughter who wanted to be Black Widow.
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    42K
  • user avatar
    Guido Appenzeller
    a16z
    @appenz
    Jul 14, 2023
    This "investor" currently has the #1 and #5 spot on GitHub's trending repos. I love working with this team.
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    48K

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