Rio 3.5 Open 397B Exposed as Model Merge
Rio de Janeiro's municipal IT company IplanRIO released Rio 3.5 Open 397B on Hugging Face on June 13, 2026 under the MIT license, claiming it beat DeepSeek V4 Pro and Qwen 3.7 Plus on benchmarks including 70.8% on Terminal-Bench 2.1 and 36.5% on Humanity's Last Exam. A day later, AI developer Nex said the model is...
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