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> A simple linear combination of every weight did not degrade the performance of the model, but enhanced it.

Enhanced it on a couple benchmarks, supposedly.

The game is to turn knobs until you get a benchmark run that shows an improvement, then ship it. There are a lot of fine tunes and chimera models on HuggingFace that are supposedly better at some specific test, but when you use them for anything else they're usually worse.

This happens with a lot of the models that are modified to remove censorship. They succeed in getting the model to emit previously censored outputs, but the overall output quality decreases.

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They seem to have deleted most of the README now, but the archived version has benchmarks.

https://web.archive.org/web/20260614082641/https://huggingfa...

And the Nex benchmarks for comparison

https://huggingface.co/nex-agi/Nex-N2-Pro

Rio seems to be about halfway between Qwen 3.5 and Nex, as you'd expect?

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It's is a well known idea[1], although it's still surprising that something as simple, even works.

[1]: https://arxiv.org/abs/2203.05482

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This team could have stopped here and still had something interesting (albeit not novel) to show. But the hype cycle was too tempting.
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This works because Nex itself is a finetune of Qwen3.5 (https://huggingface.co/nex-agi/Nex-N2-Pro). It's merging Qwen3.5 with a Qwen3.5 finetune.

I don't believe this would work on two LLMs that have different pretraining. Even if it did you would need two LLMs that have exact same internal activation shapes, dimensions, expert counts, token vocabulary, realistically it would never happen outside of finetunes or academic experiments.

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> A simple linear combination of every weight did not degrade the performance of the model, but enhanced it.

Which could be a signal that your "performance" was so abysmal in the first place that even randomly applied training methods can't make it _worse_.

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It shows that LLMs are an extremely wasteful approach to intelligence.
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or that intelligence is merely the composition of many redundant, lossy, ~random components
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