open-thoughts.ai: Advancing Open Reasoning in AI

open-thoughts.ai is a cutting-edge, community-driven initiative led by top researchers and engineers from leading institutions like Stanford, UC Berkeley, and the University of Washington, dedicated to curating and advancing the state-of-the-art in open reasoning datasets. With the release of OpenThoughts3 on June 5, 2025—followed by the specialized OpenThoughts3-1.5B on July 11, 2025—the platform delivers high-quality, SOTA data recipes designed to enhance reasoning capabilities in AI models, especially smaller ones. The project builds on prior successes like OpenThinker2 and OpenThinker-32B, and leverages rigorous evaluation of over 1000 models to ensure excellence. Backed by prestigious organizations including NSF IFML, Juelich Supercomputing Center, and Toyota Research Institute, open-thoughts.ai fosters transparency and collaboration through public access via GitHub and Hugging Face, and supports ongoing innovation with regular updates and research insights.

Key Features:

• OpenThoughts3 (SOTA Reasoning Data Recipe): Latest release featuring state-of-the-art data curation for advanced AI reasoning.
• OpenThoughts3-1.5B: Optimized version for efficient reasoning with smaller AI models.
• Large-Scale Model Evaluation: Rigorous testing of over 1000 models to ensure data quality and effectiveness.
• Community-Driven Research: Collaboration among elite academic and research institutions including Stanford, UC Berkeley, and UT Austin.
• Public Accessibility: Open datasets available on GitHub and Hugging Face for transparent, reproducible AI development.
• Regular Updates & Releases: Ongoing innovation with new versions and research publications shared via the official blog.
• Support from Leading Research Labs: Backed by institutions such as the University of Washington, LAION, Lambda Labs, and CINECA's Leonardo Supercomputer.

Pricing: open-thoughts.ai offers a Free tier for public access to datasets and tools, with premium updates and insights available through a subscription model for researchers and developers seeking advanced content.

Conclusion: open-thoughts.ai is a powerful, collaborative platform driving progress in open-source AI reasoning with scientifically rigorous, accessible datasets—ideal for researchers, developers, and AI enthusiasts committed to advancing transparent, high-performance AI systems.