Name: Towards AI Legal Name: Towards AI, Inc. Description: Towards AI is the world's leading artificial intelligence (AI) and technology publication. Read by thought-leaders and decision-makers around the world. Phone Number: +1-650-246-9381 Email: pub@towardsai.net
228 Park Avenue South New York, NY 10003 United States
Website: Publisher: https://towardsai.net/#publisher Diversity Policy: https://towardsai.net/about Ethics Policy: https://towardsai.net/about Masthead: https://towardsai.net/about
Name: Towards AI Legal Name: Towards AI, Inc. Description: Towards AI is the world's leading artificial intelligence (AI) and technology publication. Founders: Roberto Iriondo, , Job Title: Co-founder and Advisor Works for: Towards AI, Inc. Follow Roberto: X, LinkedIn, GitHub, Google Scholar, Towards AI Profile, Medium, ML@CMU, FreeCodeCamp, Crunchbase, Bloomberg, Roberto Iriondo, Generative AI Lab, Generative AI Lab VeloxTrend Ultrarix Capital Partners Denis Piffaretti, Job Title: Co-founder Works for: Towards AI, Inc. Louie Peters, Job Title: Co-founder Works for: Towards AI, Inc. Louis-François Bouchard, Job Title: Co-founder Works for: Towards AI, Inc. Cover:
Towards AI Cover
Logo:
Towards AI Logo
Areas Served: Worldwide Alternate Name: Towards AI, Inc. Alternate Name: Towards AI Co. Alternate Name: towards ai Alternate Name: towardsai Alternate Name: towards.ai Alternate Name: tai Alternate Name: toward ai Alternate Name: toward.ai Alternate Name: Towards AI, Inc. Alternate Name: towardsai.net Alternate Name: pub.towardsai.net
5 stars – based on 497 reviews

Frequently Used, Contextual References

TODO: Remember to copy unique IDs whenever it needs used. i.e., URL: 304b2e42315e

Resources

Our 15 AI experts built the most comprehensive, practical, 90+ lesson courses to master AI Engineering - we have pathways for any experience at Towards AI Academy. Cohorts still open - use COHORT10 for 10% off.

Publication

Sourcing and Collecting Data for Training Large Language Models
Artificial Intelligence   Data Science   Latest   Machine Learning

Sourcing and Collecting Data for Training Large Language Models

Last Updated on November 6, 2025 by Editorial Team

Author(s): M

Originally published on Towards AI.

Real-world insights from FineWeb, DCLM, The Stack v2, and modern LLM training

When people talk about training language models, the conversation often jumps straight to architecture choices or training techniques. But here’s the reality: you can have the most elegant transformer architecture and perfectly tuned hyperparameters, but if your training data is messy, biased, or poorly sourced, you’re building on quicksand.

Sourcing and Collecting Data for Training Large Language Models

When people talk about training language models, the conversation often jumps straight to architecture choices or training techniques.

The article discusses the importance of sourcing high-quality training data for language models, emphasizing that although there is an abundance of text data available online, the true challenge lies in identifying and using the right data responsibly. It highlights various sources of training data, such as the Common Crawl, curated datasets like FineWeb, and the methodologies for extracting, filtering, and processing data. It also explores the significance of copyright and legal considerations, ending with practical lessons learned from recent model training efforts, showcasing how effective data collection and quality control can lead to better-performing language models.

Read the full blog for free on Medium.

Join thousands of data leaders on the AI newsletter. Join over 80,000 subscribers and keep up to date with the latest developments in AI. From research to projects and ideas. If you are building an AI startup, an AI-related product, or a service, we invite you to consider becoming a sponsor.

Published via Towards AI


Take our 90+ lesson From Beginner to Advanced LLM Developer Certification: From choosing a project to deploying a working product this is the most comprehensive and practical LLM course out there!

Towards AI has published Building LLMs for Production—our 470+ page guide to mastering LLMs with practical projects and expert insights!


Discover Your Dream AI Career at Towards AI Jobs

Towards AI has built a jobs board tailored specifically to Machine Learning and Data Science Jobs and Skills. Our software searches for live AI jobs each hour, labels and categorises them and makes them easily searchable. Explore over 40,000 live jobs today with Towards AI Jobs!

Note: Content contains the views of the contributing authors and not Towards AI.