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Jan Boelts

@janboelts.bsky.social
285 followers 145 following 23 posts

Researcher at appliedAI Institute for Europe. Working on simulation-based inference and responsible ML

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Jan Boelts @janboelts.bsky.social · 24/04/2026
Model misspecification is one of the trickier challenges in SBI: what happens when your simulator doesn’t capture the observed data? I wrote an overview of the problem and methods to detect and handle it, now out in the ICLR 2026 blog post track: iclr-blogposts.github.io/2026/blog/20...
iclr-blogposts.github.io
Model Misspecification in Simulation-Based Inference - Recent Advances and Open Challenges | ICLR Blogposts 2026
Model misspecification is a critical challenge in simulation-based inference (SBI), particularly in neural SBI methods that use simulated data to train flexible neural density estimators. These method...
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Jan Boelts @janboelts.bsky.social · 23/01/2026
SBI Hackathon Grenoble is a wrap! 🎉 35 researchers and a great hybrid format of 1.5 days of tutorials + 1.5 days of applied hackathon. Many went from “having heard of sbi” to applying full SBI workflows to their own research projects. 🧵👇
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Jan Boelts @janboelts.bsky.social · 20/01/2026
On my way from Munich to Grenoble 🚞 to co-lead a 3-day SBI tutorial + hackathon together with @danielged.bsky.social, organised by Pedro Rodriguez and @ugrenoblealpes.bsky.social. Excited to meet researchers from across France, many bringing their own simulators 🚀
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Jan Boelts @janboelts.bsky.social · 21/11/2025
After years of working on SBI methods and the sbi toolbox, we finally wrote the practical guide we wished had existed when we started. Grateful to have collaborated with researchers across many institutions to consolidate what we've learned about making these methods work in practice!
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sbi - Simulation-based inference @sbi-devs.bsky.social · 17/10/2025
🎉 sbi participated in GSoC 2025 through @numfocus.bsky.social and it was a great success: our two students contributed major new features and substantial internal improvements: 🧵 👇
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Jan Boelts @janboelts.bsky.social · 18/09/2025
Materials from my EuroSciPy talk "Pyro meets SBI" are now available: github.com/janfb/pyro-meets-sbi I show how we can use @sbi-devs.bsky.social-trained neural likelihoods in pyro 🔥 Check it out if you need hierarchical Bayesian inference but your simulator / model has no tractable likelihood.
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sbi - Simulation-based inference @sbi-devs.bsky.social · 09/09/2025
From hackathon to release: sbi v0.25 is here! 🎉 What happens when dozens of SBI researchers and practitioners collaborate for a week? New inference methods, new documentation, lots of new embedding networks, a bridge to pyro and a bridge between flow matching and score-based methods 🤯 1/7 🧵
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Jan Boelts @janboelts.bsky.social · 18/08/2025
Fun read of their amazing contributions to the SBI hackathon! 🥐 The SBI-Pyro bridge that @sethaxen.com built has a lot of potential I believe. I'll actually be presenting this work at @euroscipy.bsky.social this Wednesday - excited to share this with a broader audience. euroscipy.org/talks/KCYYTF/
euroscipy.org
Pyro Meets SBI: Unlocking Hierarchical Bayesian Inference for Complex Simulators
The EuroSciPy meeting is a cross-disciplinary gathering focused on the use and development of the Python language in scientific research.
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sbi - Simulation-based inference @sbi-devs.bsky.social · 20/05/2025
More great news from the SBI community! 🎉 Two projects have been accepted for Google Summer of Code under the NumFOCUS umbrella, bringing new methods and general improvements to sbi. Big thanks to @numfocus.bsky.social, GSoC and our future contributors!
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Jan Boelts @janboelts.bsky.social · 12/05/2025
Great reminder of this sunny and so productive week in March and how much I enjoy being part of this dedicated and lovely group of SBI contributors! 🤗 Big thanks to all participants & co-organizers! 🎉
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psteinb.bsky.social @psteinb.bsky.social · 11/04/2025
🥳Great news, our JOSS paper "sbi reloaded" has been accepted! 🎉 This community lead by the fine folks of @sbi-devs.bsky.social is very welcoming and super fun to work with! I learn with every discussion I have. paper: joss.theoj.org/papers/10.21... review: github.com/openjournals...
github.com
[REVIEW]: sbi reloaded: a toolkit for simulation-based inference workflows · Issue #7754 · openjournals/joss-reviews
Submitting author: @janfb (Jan Boelts) Repository: https://github.com/sbi-dev/sbi Branch with paper.md (empty if default branch): joss-submission-2024 Version: v0.24.0 Editor: @boisgera Reviewers: ...
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Jan Boelts @janboelts.bsky.social · 04/04/2025
We have been thinking about this for a while and now it’s here 🎉Looking forward to all the exciting SBI applications we will be discussing, and to onboarding new contributors! 🚀
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psteinb.bsky.social @psteinb.bsky.social · 21/03/2025
It's been a blast, thanks to @sbi-devs.bsky.social ! This week's hackathon was phenomenal! 🙏 😍 The sbi hackathon welcomed about 25 people in Tübingen with contributions spanning the globe , e.g. 🇺🇸🇯🇵🇧🇪🇩🇪. Wanna see, what we did? Check out the PRs👇 github.com/sbi-dev/sbi/...
github.com
Pull requests · sbi-dev/sbi
sbi is a Python package for simulation-based inference, designed to meet the needs of both researchers and practitioners. Whether you need fine-grained control or an easy-to-use interface, sbi has ...
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Jan Boelts @janboelts.bsky.social · 16/03/2025
On my way to the SBI hackathon in Tübingen—on a EuroCity that’s overbooked, delayed, and mysteriously missing all reservation signs. People pacing the aisles, luggage blocking exits, a baby wailing in the distance… 🚆🔥😵‍💫 If only the German railway system were as user-friendly as the SBI package! 🥲
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Jan Boelts @janboelts.bsky.social · 02/01/2025
For everyone working with trial-based i.i.d. data and varying experimental conditions - we have you covered now! You need to train NLE only once and then can run MCMC with multiple subjects, trials and conditions, etc. Example: sbi-dev.github.io/sbi/dev/tuto... Reach out on GitHub for questions 🙋‍♂️
sbi-dev.github.io
SBI for decision-making models - sbi
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Jan Boelts @janboelts.bsky.social · 27/11/2024
So happy to be part of this project and see it growing! Many thanks to all contributors and users for making it possible 🚀
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sbi - Simulation-based inference @sbi-devs.bsky.social · 18/11/2024
Hello, world! We are a community-developed toolkit that performs Bayesian inference for simulators. We support a broad range of methods (NPE, NLE, NRE, amortized and sequential), neural network architectures (flows, diffusion models), samplers, and diagnostics. Join us!
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