Rio 3.5 faces claims it reused Nex N2 Pro
Rio 3.5 is under scrutiny because Nex says it appears to be built from Nex N2 Pro and Qwen 3.5. Nex claims a weight check points to a rough mix of 60% Nex N2 Pro and 40% Qwen 3.5. There was also a claim that, without a , Rio 3.5 can identify itself as Nex N2 Pro.
The Rio model page was later updated to credit Nex as one of the base models. The updated page says Rio 3.5 was made by merging Nex N2 Pro and -A17B, then using from a stronger model. The stronger model used for was not named.
The main issue is not that can be reused or mixed, but whether the sources were clearly credited and whether performance claims were compared fairly. Some community feedback says Nex N2 Pro has good compared with its base model, while others warn that benchmark results may not match real work.
Key points
- Nex claims Rio 3.5 is largely a merge of Nex N2 Pro and Qwen 3.5.
- The Rio model page was updated to credit Nex N2 Pro as a base model.
- The updated page also mentions from a stronger model.
- The stronger model used for was not disclosed.
- Agent builders should test real task success and before switching models.