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A cross-model analysis tested how four open coding models (Qwen3.5-9B, GLM-4-9B, Gemma, and Nemotron-Nano-9B) complete a truncated curl upload URL, finding that cloud-provider bias and fake credentials appear mainly in Qwen's tail outputs while NVIDIA's model shows the best hygiene, with a public harness and 400,000-row dataset released.