Rio 3.5 page says wrong weights were uploaded after Nex-AGI analysis
The updated model card says a base merge of Nex-N2-Pro and Qwen was uploaded by mistake, shifting the dispute from pure attribution to release discipline.
By Ryan Merket · Published
Primary source: X
Why it matters
Rio 3.5 is a live case study in open-weight provenance: licenses can allow remixing, but benchmark credibility depends on naming the upstream model and training work before the launch.
Nex-AGI (@NexEcosystem) accused Rio de Janeiro's newly popular Rio 3.5 Open 397B model of being an element-wise merge of Nex-N2-Pro and Alibaba's Qwen 3.5 base model. The Rio 3.5 Open 397B Hugging Face model card now says an earlier upload was the base merged checkpoint rather than the final distilled model.…
When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence.