International Open-Source LLM Builders Summit
The second edition of the Open-Source LLM Builders Summit will take place on 9th February 2026 at EPFL Lausanne, right before the Applied Machine Learning Days (AMLD).
The event is organized by the Swiss AI Initiative, coordinated by the EPFL AI Center and ETH AI Center. The summit will bring together leading international initiatives developing open foundation models, as well as infrastructure providers, researchers, and policymakers, to chart the path toward global, open, and collaborative AI development.
This year’s focus is threefold:
Highlighting progress from major open-source efforts
Sharing infrastructure access opportunities for large-scale training
Defining long-term models of international collaboration for AI research and governance
The summit welcomes contributors from research, government, and industry who are actively building transparent, multilingual, and mission-aligned AI systems for the public good. Participation is free, but registration is required. Space is limited and registration is subjected to approval prior confirmation.
Program
8:30 ☕ Registration & Coffee
Keynote
9:00 ATLAS: Lessons from a Global Research Collaboration Andreas Hoecker (CERN)
Open Source Models
9:30 Apertus: Democratizing Open and Compliant LLMs for Global Language Environments | Antoine Bosselut & Imanol Schlag (Swiss AI Initiative)
9:50 EuroLLM: EuroLLM & SMURF4EU: A Suite of Multimodal Reasoning Foundation Models for Europe | André F. T. Martins (IST Lisbon)
10:10 Olmo: Olmo 3: Advancing the state-of-the-art of fully open models | Kyle Lo & Luca Soldaini (Ai2)
10:30 ☕ Coffee Break
11:00 K2: Uphill battles for Open LLMs? | Hector Liu (MBZUAI)
11:20 SEA-LION: Southeast Asian Languages in One Network | Jian Gang Ngui (AI Singapore)
11:40 OpenEuroLLM: A series of foundation models for transparent AI in Europe | Matthias Bethge (Tübingen University)
Open Weight Models
12:00 Z.ai: GLM Open-Weight Models and Ecosystem Building | Yuxuan Zhang (Zhipu AI)
12:15 Qwen: Open Foundation Models | Junyang Lin (Alibaba)
12:30 📸 Group Picture, 🍽️ Lunch, & 🪧 Poster Session
Calls for Collaborative Projects
13:40 ALPS: Machine Learning at Scale at the Swiss National Supercomputing Centre (CSCS) | Joost VandeVondele (CSCS)
13:50 EuroHPC: EuroHPC AI Factory Access Calls and Collaboration Opportunities | Timothy Llewellynn (Euresearch)
Workshop - Blueprints for Global Collaboration on Open LLMs
14:00 Breakout Rooms
15:30 Coffee Break & Consolidation Panel
16:00 Presentations and Discussions
17:00 Conclusions & Apero
Organization
Note that:
The event is at full capacity. Registrations are therefore closed.
This is an invitation-only event organized by the Swiss AI Initiative, led by ETH AI Center and EPFL AI Center.
Contact PoC: [email protected] & [email protected]