We develop methods, benchmarks, and training systems that turn expert data into frontier AI

building benchmarks and collaborating with

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key research areas

Vision and impact

We help labs advance frontier models by working with domain experts to design and build complex, realistic datasets that drive model performance.

initiatives

Community and open science

Open benchmarks, conversations, and research for real-world AI performance.

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Open Benchmarks Grants

Backed by a $3M commitment, the program funds
open-source datasets, benchmarks, and evaluation artifacts that shape how frontier AI systems are built
and evaluated.

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Benchtalks

Our podcast series at the intersection of AI evaluation, data quality, and real-world impact.
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Reading Group

A recurring forum for researchers and practitioners to explore the latest frontier developments in AI while building meaningful connections within the community.

DEEP RESEARCH Expertise

Technical advisors and distinguished affiliates

Stephen Bach headshot

Stephen Bach

Brown University
Eliot Horowitz Assistant Professor, Computer Science Department
Jason Fries headshot

Jason Fries

Stanford University
Assistant Professor of Biomedical Data Science and of Medicine
Jared Dunnmon headshot

Jared Dunnmon

Co-Founder & Chief Scientist, Stealth Startup
Prev. Dir. of AI at DIU
Fred Sala headshot

Fred Sala

Chief Scientist
,
Snorkel AI
Assistant Professor @ University of Wisconsin-Madison
Chris Ré headshot

Chris Ré

Co-Founder
,
Snorkel AI
Professor @ Stanford University
Ludwig Schmidt headshot

Ludwig Schmidt

Stanford University · LAION
Stanford researcher and LAION collaborator
Karthik Narasimhan headshot

Karthik Narasimhan

Princeton University
Professor of Computer Science
Yu Su headshot

Yu Su

Ohio State University
Associate Professor of Computer Science and Engineering
Lewis Tunstall headshot

Lewis Tunstall

Hugging Face
Machine Learning Engineer
PUBLICATIONS

Browse research blogs
and academic papers

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Blog
Applying Weak Supervision Research

ScienceTalks with Paroma Varma In this episode of Science Talks, Snorkel AI’s Braden Hancock chats with Paroma Varma – a co-founder of Snorkel AI and one of the first and leading contributors to the Snorkel project. We discuss Paroma’s path into machine learning, her work in optimization and signal processing during her undergrad, weak supervision and image data during her…

Sep 13, 2021
Learn more about Applying Weak Supervision Research
Low-Shot Validation: Active Importance Sampling for Estimating Classifier Performance on Rare Categories
For machine learning models trained with limited labeled training data, validation stands to become the main bottleneck to reducing overall annotation costs. We propose a statistical validation algorithm that accurately estimates the F-score of binary classifiers for rare categories, where finding relevant examples to evaluate on is particularly challenging. Our key insight is that simultaneous calibration and importance sampling enables accurate estimates even in the low-sample regime (< 300 samples). Critically, we also derive an accurate single-trial estimator of the variance of our method and demonstrate that this estimator is empirically accurate at low sample counts, enabling a practitioner to...
Research Paper
Low-Shot Validation: Active Importance Sampling for Estimating Classifier Performance on Rare Categories

For machine learning models trained with limited labeled training data, validation stands to become the main bottleneck to reducing overall annotation costs. We propose a statistical validation algorithm that accurately estimates the F-score of binary classifiers for rare categories, where finding relevant examples to evaluate on is particularly challenging. Our key insight is that simultaneous calibration and importance sampling enables…

Sep 13, 2021

F. Poms, et al.

Learn more about Low-Shot Validation: Active Importance Sampling for Estimating Classifier Performance on Rare Categories
Blog
Sliceline: Fast, Linear-Algebra-Based Slice Finding for ML Model Debugging

Diving Into SliceLine – Machine Learning Whiteboard (MLW) Open-source Series Earlier this year, we started our machine learning whiteboard (MLW) series, an open-invite space to brainstorm ideas and discuss the latest papers, techniques, and workflows in the AI space. We emphasize an informal and open environment to everyone interested in learning about machine learning.In this episode, Kaushik Shivakumar dives into…

Sep 08, 2021
Learn more about Sliceline: Fast, Linear-Algebra-Based Slice Finding for ML Model Debugging
Systematic Review of Approaches to Preserve Machine Learning Performance in the Presence of Temporal Dataset Shift in Clinical Medicine
Objective: The change in performance of machine learning models over time as a result of temporal dataset shift is a barrier to machine learning-derived models facilitating decision-making in clinical practice. Our aim was to describe technical procedures used to preserve the performance of machine learning models in the presence of temporal dataset shifts. Methods: Studies were included if they were fully published articles that used machine learning and implemented a procedure to mitigate the effects of temporal dataset shift in a clinical setting. We described how dataset shift was measured, the procedures used to preserve model performance, and their effects....
Research Paper
Systematic Review of Approaches to Preserve Machine Learning Performance in the Presence of Temporal Dataset Shift in Clinical Medicine

Objective: The change in performance of machine learning models over time as a result of temporal dataset shift is a barrier to machine learning-derived models facilitating decision-making in clinical practice. Our aim was to describe technical procedures used to preserve the performance of machine learning models in the presence of temporal dataset shifts. Methods: Studies were included if they were…

Sep 01, 2021

LL Guo, et al.

Learn more about Systematic Review of Approaches to Preserve Machine Learning Performance in the Presence of Temporal Dataset Shift in Clinical Medicine
Hidden network generating rules from partially observed complex networks
Complex biological, neuroscience, geoscience and social networks exhibit heterogeneous self-similar higher order topological structures that are usually characterized as being multifractal in nature. However, describing their topological complexity through a compact mathematical description and deciphering their topological governing rules has remained elusive and prevented a comprehensive understanding of networks. To overcome this challenge, we propose a weighted multifractal graph model capable of capturing the underlying generating rules of complex systems and characterizing their node heterogeneity and pairwise interactions. To infer the generating measure with hidden information, we introduce a variational expectation maximization framework. We demonstrate the robustness of the network...
Research Paper
Hidden network generating rules from partially observed complex networks

Complex biological, neuroscience, geoscience and social networks exhibit heterogeneous self-similar higher order topological structures that are usually characterized as being multifractal in nature. However, describing their topological complexity through a compact mathematical description and deciphering their topological governing rules has remained elusive and prevented a comprehensive understanding of networks. To overcome this challenge, we propose a weighted multifractal graph model…

Sep 01, 2021

R. Yang, et al.

Learn more about Hidden network generating rules from partially observed complex networks
Blog
The Future of Data-Centric AI – Virtual Live Event

Join the live discussion. Learn how to unlock data-centric AI and make AI development practical in your organization Working with vast unstructured and unlabeled data is one of the bottlenecks in the machine learning lifecycle. Machine learning models can only get as reliable and accurate as the data being fed to them. With a data-centric approach 1, your data science…

Aug 31, 2021
Learn more about The Future of Data-Centric AI – Virtual Live Event
Blog
Developing and Managing Systems to Extract Structured Data

Machine Learning Whiteboard (MLW) Open-source Series Earlier this year, we started our machine learning whiteboard (MLW) series, an open-invite space to brainstorm ideas and discuss the latest papers, techniques, and workflows in the AI space. We emphasize an informal and open environment to everyone interested in learning about machine learning.In this episode, Manan Shah dives into “Glean: Structured Extractions from…

Aug 02, 2021
Learn more about Developing and Managing Systems to Extract Structured Data
Semi-Supervised Aggregation of Dependent Weak Supervision Sources with Performance Guarantees
This work shows a rigorous technique for efficiently selecting small subsets of the labelers so that a majority vote from such subsets has a provably low error rate.
Research Paper
Semi-Supervised Aggregation of Dependent Weak Supervision Sources with Performance Guarantees

This work shows a rigorous technique for efficiently selecting small subsets of the labelers so that a majority vote from such subsets has a provably low error rate.

Jul 18, 2021

A. Mazzetto, et al, 2021

Learn more about Semi-Supervised Aggregation of Dependent Weak Supervision Sources with Performance Guarantees
Proceedings of the First Workshop on Weakly Supervised Learning (WeaSuL)
In this workshop, we want to advance theory, methods and tools for allowing experts to express prior coded knowledge for automatic data annotations that can be used to train arbitrary deep neural networks for prediction. The ICLR 2021 Workshop on Weak Supervision aims at advancing methods that help modern machine-learning methods to generalize from knowledge provided by experts, in interaction with observable (unlabeled) data. We called for both long and short papers and received 26 submissions, all of which were double-blindly reviewed by a pool of 29 reviewers. In total, 15 papers were accepted. All the accepted contributions are listed...
Research Paper
Proceedings of the First Workshop on Weakly Supervised Learning (WeaSuL)

In this workshop, we want to advance theory, methods and tools for allowing experts to express prior coded knowledge for automatic data annotations that can be used to train arbitrary deep neural networks for prediction. The ICLR 2021 Workshop on Weak Supervision aims at advancing methods that help modern machine-learning methods to generalize from knowledge provided by experts, in interaction…

Jul 08, 2021

MA. Hedderich, et al.

Learn more about Proceedings of the First Workshop on Weakly Supervised Learning (WeaSuL)
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