Replication measures 4.62-6.10% package hallucination rates on five 2026-era LLMs and finds 127 common invented names across models, 53 of which remain registrable on PyPI or npm.
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The Range Shrinks, the Threat Remains: Re-evaluating LLM Package Hallucinations on the 2026 Frontier-Model Cohort
Replication measures 4.62-6.10% package hallucination rates on five 2026-era LLMs and finds 127 common invented names across models, 53 of which remain registrable on PyPI or npm.