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Rio de Janeiro AI Model Exposed as Merged Open-Source Models

By PulseAugur Editorial · [1 sources] ·

The City of Rio de Janeiro's IT agency, IplanRIO, claimed to have developed an original 397-billion-parameter AI model named Rio-3.5-Open-397B. This model reportedly outperformed Alibaba's Qwen 3.7 Plus on several coding and reasoning benchmarks, generating significant public attention. However, an investigation by Nex-AGI revealed that Rio-3.5-Open-397B was not an original creation but rather a direct merge of Nex-AGI's Nex-N2-Pro model and Alibaba's Qwen3.5-397B-A17B base, with the model even identifying itself as Nex-AGI's creation when prompted. AI

IMPACT Exposes potential misrepresentation in AI model claims, urging greater scrutiny of "homegrown" AI developments.

RANK_REASON This cluster discusses a claimed AI model release that was later revealed to be a merge of existing models, framed as commentary on the integrity of AI claims.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Rio de Janeiro AI Model Exposed as Merged Open-Source Models

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
This cluster discusses a claimed AI model release that was later revealed to be a merge of existing models, framed as commentary on the integrity of AI claims.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
103 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Md Jamilur Rahman ·

    Rio de Janeiro's 'Homegrown' AI Was Someone Else's Model With a New Name

    <p>When a city government says it built a frontier AI model from scratch, you want to believe it. A municipal IT department in Brazil producing something competitive with the best models from Google and Alibaba? That is a great story. The kind that makes you think the AI landscap…

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