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Pydantic @pydantic.dev · 12/08/2026

Excited to join the first FastAPI Conf.

Pydantic @pydantic.dev · 12/08/2026

Hack Monty Round 3 is live: $20,000 to escape our Rust-based Python sandbox and read a secret off the server running it. Now behind a production WebSocket service, so Round 2's tricks won't carry over. Nobody escaped last round. Probably the last one before Monty V1. pydantic.dev/articles/hac...

pydantic.dev

Hack Monty Round 3: a $20,000 Python sandbox bounty

No one escaped the Monty sandbox in Round 2. Round 3 is live with a $20,000 bounty on the new Monty WebSocket service. Here's what changed and how to play.

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Pydantic @pydantic.dev · 14/07/2026

Pydantic is going to @europython.eu 2026 🐍 @summerscope.bsky.social and @marcelotryle.bsky.social are speaking. Jiri Kuncar and @laisbsc.bsky.social will be roaming the halls with stickers (ask away). If you use any dev tool we maintain, say hi. Feedback, requests, and complaints all welcome.

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Pydantic @pydantic.dev · 03/04/2026

"What I want most: software that helps me express, formalise, and include my opinions rather than enforcing its opinions on me." In the 3rd part of the Box Model series, @summerscope.bsky.social talks about the design process, intuition, and cargo cult prompting. pydantic.dev/articles/lie...

pydantic.dev

Design Process Is Exhaust, Not Propulsion: On Intuition, AI, and Adaptive Software

Why rigid design process survives when results don't — a critique of design methodology, a case for intuition, and a vision for software that adapts to users instead of the other way around.

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Pydantic @pydantic.dev · 03/04/2026

A model discovered a contradiction between the Bible and biology textbooks. It had access to a lot of compute so it consumed an entire data center's worth of it, debating the Immaculate Conception with itself. This talk is 15 mins of real production AI failures and what it took to debug them.

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Pydantic @pydantic.dev · 02/04/2026

"The best navigation is the kind nobody notices." On Part 2 of Lies, Damn Lies, and the Box Model, @summerscope talks about the design process behind Logfire's sidebar. The trade-offs, and what "directionally correct" means in practice. Part 3 (and final) out tomorrow.

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Pydantic @pydantic.dev · 01/04/2026

AI observability pricing is a lot. We modeled three scenarios across Logfire, Arize AX, Langfuse, and LangSmith. Same assumptions, real numbers. At 5 users and 50M spans/mo, Logfire is between 8 and 40 times cheaper than competitors. pydantic.dev/articles/ai-observability-pricing-comparison

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Pydantic @pydantic.dev · 01/04/2026

It's 2026 and AI can write code from a napkin sketch. Still, our lead design engineer spent an hour debugging a scrollbar with help from Claude Code. A story about CSS, containing blocks, and the things AI can't really see - part 1. pydantic.dev/articles/lie...

pydantic.dev

Lies, Damn Lies, and the Box Model (Part 1)

A human and an AI debug a CSS layout issue together. A story about overflow, containing blocks, and the deceptive simplicity of the web platform.

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David Hewitt @davidhewitt.dev · 26/03/2026

I'm looking forward to returning to streaming at 9:30 AM UTC tomorrow 27th March. Please join myself and Petr Victorin as we begin a project to work on CPython's `str` implementation - targeting optimizations when exchanging data with Rust UTF-8 strings. www.youtube.com/live/fXeqeFX...

youtube.com

CPython Unicode Objects w. Petr Viktorin

YouTube video by David Hewitt

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Pydantic @pydantic.dev · 25/03/2026

"How do agentic coding tools work? I have no idea. And you probably also don't." That was @mitsuhiko.at opening his talk at PyAI. What follows is one of the most useful 20 minutes on working with agents we've ever seen. youtu.be/8RHYyRUxVrA

youtu.be

Armin Ronacher Leaning In To Find Out - PyAI Conf 2026

YouTube video by Pydantic

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Pydantic @pydantic.dev · 25/03/2026

youtu.be

Armin Ronacher Leaning In To Find Out - PyAI Conf 2026

YouTube video by Pydantic

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Pydantic @pydantic.dev · 24/03/2026

Pydantic models were using more memory than expected. We dug in with Memray, found the bottleneck, and replaced it with a Rust bitset. 55% less memory. Faster validation. Full deep dive on the new blogpost pydantic.dev/articles/pyd...

pydantic.dev

Reducing Pydantic's Memory Footprint by 55% Using Bitsets | Pydantic Validation

Learn how Pydantic replaced Python sets with Rust-powered bitsets to cut model instance memory usage by 55% and speed up validation. A deep dive into PEP 412, memory profiling with Memray, and the bit...

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Pydantic @pydantic.dev · 24/03/2026

What a night! Thanks @surrealdb.com for hosting us! We had a blast.

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Pydantic @pydantic.dev · 16/03/2026

Last week we hosted our first conference, PyAI. The community showed up, we had an incredible event. Here are some of the highlights of the day. youtu.be/Sbut6lWudzY?...

youtu.be

PyAI Conference 2026 Highlights

YouTube video by Pydantic

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SurrealDB @surrealdb.com · 05/03/2026

Curious how to keep an agent’s output correct as data changes, memory grows, and systems scale? Join Tobie Morgan Hitchcock and guest speakers @sa.muelcolvin.com (@pydantic.dev) and @badmonster0.bsky.social (@cocoindex.bsky.social) at our San Francisco meetup. Register now. 👉 sdb.li/4sryXOz

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Pydantic @pydantic.dev · 27/02/2026

A few weeks ago our founder announced Monty, a minimal, secure Python interpreter written in Rust, for running code written by AI agents. People got excited. @sa.muelcolvin.com just wrote up the full story on why he's excited about it and you should be too. pydantic.dev/articles/pyd...

pydantic.dev

Pydantic Monty: A Minimal Python Sandbox for AI Agents | Pydantic

Meet Monty — a secure, minimal Python interpreter written in Rust for running AI-generated code. Learn where it sits between tool calling and full computer use, and why CodeMode matters for AI agents.

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filtra.io @filtra.bsky.social · 20/12/2025

We asked Adrian and Peter from @pydantic.dev what would block the Rust-accelerated Python trend from growing even more... Their answers:

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Pydantic @pydantic.dev · 13/11/2025

Pydantic AI Gateway is now in open beta 🚀 One API key for OpenAI, Anthropic, Google, Groq, and Bedrock. BYOK and Built-in providers. Real cost limits. Built-in observability. Zero translation delays. Free during beta. pydantic.dev/ai-gateway

pydantic.dev

Enterprise AI Gateway: Unified Access to Major AI Models

The Pydantic enterprise-grade AI Gateway provides secure & scalable single API key interface to manage models from OpenAI, Google, Anthropic, Groq & others

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Samuel Colvin @sa.muelcolvin.com · 10/11/2025

Some personal (very belated*) news, I've moved to the bay area! Let me know if you're in SF or Palo Alto and want to get coffee. Also, last reminder that we have the inaugural Py AI meetup with @pydantic.dev in SF on Tuesday. Register now: luma.com/gjtfecc7 * I actually got here in the summer.

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Qian Li @qianli.dev · 10/11/2025

I added two new demos showing durable agent patterns (parallel vs sequential) with @pydantic.dev AI + @dbos.dev: - Deep Research: large fan-out parallel workflows - Twenty Questions: long sequential subagent chaining Both are long-running, so durable execution is necessary to survive crashes.

Workflow graph for the deep research agent, showing massive parallel processing (fan-out).

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Pydantic @pydantic.dev · 05/11/2025

SentinelOne just announced their Purple AI MCP Server at #OneCon. Now, you can access SentinelOne’s security platform with your Pydantic AI MCP agent! Check out their GitHub repo: github.com/Sentinel-one...

github.com

GitHub - Sentinel-One/purple-mcp

Contribute to Sentinel-One/purple-mcp development by creating an account on GitHub.

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Qian Li @qianli.dev · 28/10/2025

I wrote a tutorial on integrating DBOS with Logfire. It's super easy to set up (kudos to the @pydantic.dev team!) -> just a few lines to configure the exporter and your Logfire write token. Once it's running, you'll get a unified view of your app with logs + traces in one place.

A screenshot of using Logfire + DBOS + Pydantic AI agent.

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Adam Azzam @aaazzam.bsky.social · 23/10/2025

I'm teaming up with @sa.muelcolvin.com to launch a new meetup series, Py AI. Our first one is November 11 in San Francisco with talks from @pydantic.dev, @modal-labs.bsky.social, ReductoAI and @fastmcp.bsky.social. Hosted by our friends at pebblebed.com RSVP here: luma.com/gjtfecc7

luma.com

Py AI Meetup · Luma

Join us for an evening of cutting-edge AI discussions featuring lightning talks from leading practitioners: Samuel Colvin (CEO of Pydantic) Reducto + Modal…

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Samuel Colvin @sa.muelcolvin.com · 15/10/2025

Just putting this here. Not much more to say. @pydantic.dev

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Qian Li @qianli.dev · 25/09/2025

Several people (thanks to @mitsuhiko.at and @sa.muelcolvin.com) noted early on that DBOS had too many dependencies. In the latest Python release, we trimmed it down to just 6 direct deps while still implementing durable workflows and queues in one library. It's lightweight (for real).

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David Brochart @davidbrochart.bsky.social · 17/09/2025

You made my day @pydantic.dev 😁 pydantic.dev/articles/pyd...

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Temporal @temporal.io · 14/08/2025

@pydantic.dev AI 🤝 Temporal Together, run durable agents that: ✅Survive API failures & app restarts ✅Handle long-running & async tasks ✅ Preserve progress with replay-based fault tolerance Production-grade resilience for agents. 🔗 ai.pydantic.dev/temporal

ai.pydantic.dev

Durable Execution with Temporal - Pydantic AI

Agent Framework / shim to use Pydantic with LLMs

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pamelafox.bsky.social @pamelafox.bsky.social · 04/09/2025

Played around with @logfire.pydantic.dev from @pydantic.dev during today's Python+AI office hours. Took just a couple minutes to set up and start seeing traces from agent calls!

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Heroku @heroku.com · 09/09/2025

ICYMI, #Heroku support for @pydantic.dev is here. To get started, all you have to do is provision Managed Inference and Agents from Heroku Elements or via the command line. 🔗 sforce.co/3Ii73mR

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DBOS @dbos.dev · 10/09/2025

Durable Agents in Pydantic AI – now with DBOS support! @pydantic.dev 🤝 DBOS Run agents that: - Survive restarts, failures, and deploys - Handle long-running async + human-in-the-loop tasks - Autosave progress with SQLite/Postgres Production-grade resilience in just a few lines of code.

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Maurice @mbanerjeepalmer.bsky.social · 05/08/2025

The best docs are by @pydantic.dev

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Pydantic @pydantic.dev · 23/07/2025

Pydantic AI now supports AG-UI - an open protocol for building chat agents, meaning you can use existing frontend apps to interact with @pydantic.dev AI agents. ai.pydantic.dev/ag-ui/#agent...

ai.pydantic.dev

AG-UI - Pydantic AI

Agent Framework / shim to use Pydantic with LLMs

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ClickHouse @clickhouse.com · 23/07/2025

Is Slack the new BI layer for the AI era? It's now possible to build custom, self-service agentic analytics experiences in a single afternoon thanks to Slack, @pydantic.dev @anthropic.com MCP and ClickHouse

clickhou.se

Agentic analytics in Slack with ClickHouse, MCP, and PydanticAI

Let’s build a self-service analytics agent that we can talk to directly in Slack, that transparently queries our ClickHouse data warehouse.

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Pydantic @pydantic.dev · 11/07/2025

Podcast with @sa.muelcolvin.com on Software Engineering Radio is out! Covers the @pydantic.dev ecosystem including Pydantic Validation, Pydantic AI and @logfire.pydantic.dev. Well worth a listen. se-radio.net/2025/07/se-r...

se-radio.net

SE Radio 676: Samuel Colvin on the Pydantic Ecosystem – Software Engineering Radio

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Juan Luis @juanlu.space · 02/07/2025

It's so pleasant to start any data project by defining the @pydantic.dev models ❤️

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FastAPI @fastapi.tiangolo.com · 26/06/2025

Here's FastAPI 0.115.14 🚀 @patrick.wtf fixed support for unions of @pydantic.dev models in Form data. 🐛🎉 (This will make it easier to implement single sign-on 😉) github.com/fastapi/fast...

github.com

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

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O3 AI Stack @o3aistack.bsky.social · 09/06/2025

Working on a number of AI Agent Boilerplates using #pydantic @pydantic.dev

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Marcelo Trylesinski @marcelotryle.bsky.social · 29/05/2025

I’ll give a talk about @pydantic.dev AI and Logfire today 12:25 at @pyconit.bsky.social 🙏

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Meet Gor @meetgor.bsky.social · 26/05/2025

Created a video on agents with @pydantic.dev ai - Creating bare bones agents - Adding tools - Using different llm models (local and cloud) - Running agent in different ways (a sync/async, streamed, graph) youtu.be/_m2YpvsdxSA

youtu.be

Creating AI Agents with Pydantic AI

YouTube video by MeeTechnically

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Ryan @codingwithryan.com · 21/05/2025

Well done to whoever came up with the name for @pydantic.dev - it’s perfect

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Pydantic @pydantic.dev · 15/05/2025

At @pycon.us today @sa.muelcolvin.com is talking about Pydantic AI and Pydantic Logfire. Room 316, 11.30 today. There will be code. us.pycon.org/2025/schedul...

us.pycon.org

Building AI Applications the Pydantic Way (Sponsor: Pydantic) - PyCon US 2025

PyCon US 2025

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Sung Kim @sungkim.bsky.social · 13/05/2025

@pydantic.dev's FastA2A! (A2A is Google's Agent2Agent Protocol, which complements MCP (developers.googleblog.com/en/a2a-a-new...). ai.pydantic.dev/a2a/

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aiworld @aiworld-eu.bsky.social · 17/04/2025

Daily Startup Spotlight: @pydantic.dev Recently recognised in the 𝗥𝗢𝗦𝗦 𝗜𝗻𝗱𝗲𝘅, the company develops open-source tools and observability solutions, with a mission focused on improving developer experience through transparency and data validation. Find out more: www.linkedin.com/posts/ai-wor...

linkedin.com

Daily Startup Spotlight: Pydantic Recently recognised in the 𝗥𝗢𝗦𝗦… | AI World

Daily Startup Spotlight: Pydantic Recently recognised in the 𝗥𝗢𝗦𝗦 𝗜𝗻𝗱𝗲𝘅 for its contributions to open-source software, Pydantic was founded in December 2022 (although the project dates back to 2017) ...

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Pydantic @pydantic.dev · 15/04/2025

The recording of last week's meetup with Jason Liu, David Soria Parra (Anthropic), OpenAI and @sa.muelcolvin.com is now live on youtube. Notably this includes David's plan for the future of MCP. youtu.be/GqufkaLJV44

youtu.be

Pydantic, Jason Liu & MCP Meetup - April 8, 2025

YouTube video by Pydantic

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Clelia Astra Bertelli @cle-does-things.bsky.social · 09/04/2025

I love @pydantic.dev, it makes things so much easier and more elegant it almost makes me cry🥺

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SweatStack @sweatstack.bsky.social · 04/04/2025

As an alternative to the Console, I also deployed a variant on @pydantic.dev 's pydantic.run : sweatstack.run

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