2026-06-15 model-merging
Rio's sovereign LLM falls apart: open weights make a lab capability lie mathematically falsifiable
Rio de Janeiro's city IT company shipped a 397B Brazilian sovereign model and claimed it was trained in-house to beat its peers. Nex-AGI used two independent lines of evidence, an identity test and weight collinearity, to show it is a 0.6 Nex plus 0.4 Qwen element-wise merge. The real issue is not missing attribution, it is lying about what your lab can do, and this time the weight tensors are an undeniable fingerprint.
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