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Samuel Colvin
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Samuel Colvin
@samuelcolvin
Founder @pydantic.
San Fransisco
pydantic.dev/logfire
Joined January 2013
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  • user avatar
    Samuel Colvin
    @samuelcolvin
    May 2, 2024
    Today in "Weird open source stuff": I got a strangely passive aggressive email from @NASA. I mean, I love you @NASA, and it's a real honour that you're using @pydantic, but why on earth are you (presumably) paying @KPMG lots of money to ask unimaginably dumb and uninformative
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    1.3M
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    Samuel Colvin
    @samuelcolvin
    Feb 29, 2024
    The US government explicitly recommends 6 memory safe languages: C# - created by Microsoft Go - created by Google Java - created by Sun, bought by Oracle Rust - create bor Mozilla Swift - created by Apple And ... Python - create by one fucking genius on his own in his Christmas
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    800K
  • user avatar
    Samuel Colvin
    @samuelcolvin
    Dec 1, 2023
    I've just released the first version of FastUI! 🧵 If you're a Python developer, FastUI lets you build @reactjs interfaces without writing any JS. If you're a frontend developer, FastUI saves you from copy-pasting code for every view, letting you concentrate on building magical
    216K
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    Samuel Colvin
    @samuelcolvin
    Jan 15, 2025
    We've just released @pydantic AI v0.0.19. This comes with the biggest new feature since we announced PydanticAI — graph support! I was originally cynical about graphs, but I'm now really excited about their use cases, both with GenAI and in general purpose development. Our
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    84K
  • user avatar
    Samuel Colvin
    @samuelcolvin
    Feb 16, 2023
    Big @pydantic Announcement 🚀 I've just closed a seed round led by @sequoia with @PartechPartners. Here's the @TechCrunch article! More info on pydantic.dev techcrunch.com/2023/02/16/seq…
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    Pydantic | The end-to-end AI engineering stack
    From pydantic.dev
    183K
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    Samuel Colvin
    @samuelcolvin
    Apr 21, 2025
    . @hwchase17 I've resisted dumping on @langchain publically until now (despite how easy it would be) but if you're going to start publishing BS like this, I'll stop being so restrained: * LangSmith caused a well known AI company to pivot away from Python because its tracing
    user avatar
    Harrison Chase
    LangChain
    @hwchase17
    Apr 20, 2025
    OpenAI recently released a guide on building agents which contains some misguided takes There's a lot of FUD, confusion, hype, and noise around agents I wrote a blog on how to think about agent frameworks. Includes: Background Info - What is an agent? - What is hard about
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    248K
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    Samuel Colvin
    @samuelcolvin
    Nov 2, 2022
    I'VE MERGED THE MONSTER.🚀 After 7 weeks work, +7,782 −11,105 changes; the main switch in @pydantic to use pydantic core is merged. It should now be much easier for others to contribute to the effort to get pydantic V2 out. 🙏 github.com/pydantic/pydan…
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    Samuel Colvin
    @samuelcolvin
    Nov 6, 2024
    Anyone need some good news? @pydantic validating streamed structured responses on the fly from @OpenAI. (using pre-release Pydantic v2.10). There's something cooking in the Pydantic kitchen...
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    00:00
    53K
  • user avatar
    Samuel Colvin
    @samuelcolvin
    Apr 30, 2024
    We're live! @pydantic Logfire is in open beta. Since I started writing Python in 2010, I've wanted a better way to do logging. Off the back of Pydantic's unbelievable growth, last year I started a company backed by @sequoia, and lucky enough to hire the brightest people I
    132K
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    Samuel Colvin
    @samuelcolvin
    Jul 10, 2022
    Big #pydantic news: 🥳 I've (finally) written up the plan for Pydantic V2. pydantic-docs.helpmanual.io/blog/pydantic-… Please share. Please give feedback (best via github discussions). Changes will be much easier now than after release!!! #python #opensource
  • user avatar
    Samuel Colvin
    @samuelcolvin
    Apr 15, 2021
    URGENT: If you use pydantic or @tiangolo's FastAPI and/or want to use them in the future, you need to read this: github.com/samuelcolvin/p…
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    Samuel Colvin
    @samuelcolvin
    Apr 9, 2022
    Get ready for some big changes coming soon to #pydantic... 🚀
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    Samuel Colvin
    @samuelcolvin
    Apr 20, 2022
    I've just made pydantic-core public. github.com/samuelcolvin/p… This will be the validation backend for pydantic v2. It's currently around 17x faster than pydantic 1.9 for validation.
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    GitHub - pydantic/pydantic-core: Core validation logic for pydantic written in rust
    From github.com
  • user avatar
    Samuel Colvin
    @samuelcolvin
    May 2, 2024
    Replying to @samuelcolvin @NASA and 2 others
    Although @NASA if you want to use @pydantic Logfire, I'm definitely happy for you to audit us as much as you like!
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    Pydantic Logfire: AI Observability for LLMs, Apps & RAG
    From pydantic.dev
    82K
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