Why open source genrerative AI must include full access to training data sources
OSAI without data?
OSI OSAI definition and the consequences
Latest news
02 December 2025
Mistral 3: A Heavyweight Model, Lightweight on Openness
The Mistral 3 family, including the massive 675B Mistral Large 3, fills a gap for high-performance European models and aids local data governance, it fails to set a new standard for openness.
29 August 2025
Lumo: the least open 'open' AI assistant
Proton sets a new record in open-washing
01 August 2025
BERT: The original sin of open-washing large language models
Already in 2018 Google's pioneering LLM 'BERT' was marketed as open source, leading an entire field down a dubious path.
18 July 2025
MusGO: a new openness index for the music domain
A new resource building on our openness framework
28 May 2025
YuLan-Mini: A new highly open model
Gaoling School of Artificial Intelligence releases a new highly open AI model
27 May 2025
OpenGPT-X: Open Source AI 'Made in Germany' falls short of own claims
In this deep dive we evaluate OpenGPT-X's flagship Teuken models through the lens of openness
03 April 2025
Introducing Performance Classes in the OS AI Index
How we classify models under 3 performance classes: Limited, Full and Latest
24 February 2025
Introducing the European Open Source AI Index
In which we introduce the European Open Source AI Index and explain how to follow a moving target
17 February 2025
Luminous: the language model that wasn't
In which we trace the silent demise of a hyped German large language model
25 January 2025
How Open is DeepSeek?
Investigating the open-source status of DeepSeek-R1