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Open-source Mimir v1 model achieves frontier performance with ethical data

Researchers have introduced Mimir v1, a 1-billion-parameter language model built on the Hierarchical Reasoning Model (HRM) architecture. This model achieves competitive performance in English and sets a new state-of-the-art for Danish, utilizing exclusively permissible post-training data. Mimir v1 was trained on 161 diverse datasets and demonstrates performance comparable to larger models like Qwen 3.5 4B and Gemma 4 E2B across 20 benchmarks. AI

IMPACT Provides a competitive open-source alternative trained on ethically sourced data, potentially lowering barriers for researchers.

RANK_REASON Research paper detailing a new language model release. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.AI →

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

Open-source Mimir v1 model achieves frontier performance with ethical data

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Research paper detailing a new language model release. [lever_c_demoted from research: ic=1 ai=1.0]
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COVERAGE [1]

  1. arXiv cs.AI TIER_1 English(EN) · Peter Schneider-Kamp, Jacob Nielsen, Gianluca Barmina, Kenneth Enevoldsen, Lukas Galke Poech ·

    DFM Mimir v1: An Open HRM Delivering Frontier Performance at 1B Parameters Using Only Permissible Post-Training Data

    arXiv:2608.13517v1 Announce Type: cross Abstract: Current large language model development relies on massive, often non-permissible datasets, creating a high barrier for researchers committed to open-source and ethically sourced data. We introduce Mimir v1, a 1-billion-parameter …