Open-Weight LineageOSI

Open Source AI Definition 1.0

Open Source AI Definition 1.0 — 3 components: Data Information, Code and Parameters

Why it matters

Established the grounds for ruling that most of Llama, Gemma and Qwen are not open source

Source — Primary sources first; secondary reports are labelled “Press”

Officialopensource.orghttps://opensource.org/ai/open-source-ai-definition

Added in Week 35, 2026 · See that week

Same week

π0 — flow matching, up to 50 Hz, 8 robot typesOfficialSabotage Evaluations for Frontier ModelsPaper

Nearby on the same axis

GENIAC cycle 1 yields PLaMo-100B-Pretrained (100B parameters, from scratch)OfficialMeta releases Llama 3.2 with vision and on-device modelsOfficialDeepSeek-V3 (671B / 37B active, MIT), about 2,788K GPU hoursPressAlibaba releases Qwen2.5Official