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      "statement": "# Touvron and colleagues: Llama 2 foundation and chat model family\n\nReleased and evaluated Llama 2 pretrained models from 7B to 70B parameters and fine-tuned dialogue variants, documenting training and safety methods.\n\n## Scientific scope\n\nThis is the 2023 Llama 2 research report, distinct from the original LLaMA and later Llama 3. Benchmarks and safety evaluations are those reported by the team.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nHugo Touvron; Louis Martin; Kevin Stone; Peter Albert; Amjad Almahairi; Yasmine Babaei; Nikolay Bashlykov; Soumya Batra; Prajjwal Bhargava; Shruti Bhosale; Dan Bikel; Lukas Blecher; Cristian Canton Ferrer; Moya Chen; Guillem Cucurull; David Esiobu; Jude Fernandes; Jeremy Fu; Wenyin Fu; Brian Fuller; Cynthia Gao; Vedanuj Goswami; Naman Goyal; Anthony Hartshorn; Saghar Hosseini; Rui Hou; Hakan Inan; Marcin Kardas; Viktor Kerkez; Madian Khabsa; Isabel Kloumann; Artem Korenev; Punit Singh Koura; Marie-Anne Lachaux; Thibaut Lavril; Jenya Lee; Diana Liskovich; Yinghai Lu; Yuning Mao; Xavier Martinet; Todor Mihaylov; Pushkar Mishra; Igor Molybog; Yixin Nie; Andrew Poulton; Jeremy Reizenstein; Rashi Rungta; Kalyan Saladi; Alan Schelten; Ruan Silva; Eric Michael Smith; Ranjan Subramanian; Xiaoqing Ellen Tan; Binh Tang; Ross Taylor; Adina Williams; Jian Xiang Kuan; Puxin Xu; Zheng Yan; Iliyan Zarov; Yuchen Zhang; Angela Fan; Melanie Kambadur; Sharan Narang; Aurelien Rodriguez; Robert Stojnic; Sergey Edunov; Thomas Scialom\n\nComplete named paper byline. Human research, source-reported system execution and experimental validation are distinct; individual effort shares are not measured.\n\n\n\n## Original sources\n\n- [Touvron and colleagues: Llama 2 foundation and chat model family — original paper](https://arxiv.org/abs/2307.09288v2)\n- [Touvron and colleagues: Llama 2 foundation and chat model family — company research page](https://ai.meta.com/research/publications/llama-2-open-foundation-and-fine-tuned-chat-models/)\n",
      "summary": "Released and evaluated Llama 2 pretrained models from 7B to 70B parameters and fine-tuned dialogue variants, documenting training and safety methods.",
      "title": "Touvron and colleagues: Llama 2 foundation and chat model family"
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    "profile": "wrs-published-grade-1",
    "edition": "2026-10-28.1",
    "id": "touvron-et-al-llama2-2023",
    "entry_id": "touvron-et-al-llama2-2023",
    "revision": 1,
    "title": "Touvron and colleagues: Llama 2 foundation and chat model family",
    "context": "Foundation language models",
    "track": "Human-designed AI research method or resource",
    "band": "B",
    "modifier": null,
    "status": "PROVISIONAL_EDITORIAL",
    "assessed_on": "2026-09-27",
    "evidence_cutoff": "2026-09-27",
    "achievement_state": "SUPPORTED_SCOPED_RESULT",
    "what_changed": "Released and evaluated Llama 2 pretrained models from 7B to 70B parameters and fine-tuned dialogue variants, documenting training and safety methods.",
    "scope": "Released and evaluated Llama 2 pretrained models from 7B to 70B parameters and fine-tuned dialogue variants, documenting training and safety methods. Scope limitation: This is the 2023 Llama 2 research report, distinct from the original LLaMA and later Llama 3. Benchmarks and safety evaluations are those reported by the team.",
    "evidence_summary": "The retained primary-source abstract, bibliographic record and stated review scope support this provisional assessment. No independent experimental replication by WRS is claimed. This is the 2023 Llama 2 research report, distinct from the original LLaMA and later Llama 3. Benchmarks and safety evaluations are those reported by the team.",
    "references": [
      {
        "title": "Touvron and colleagues: Llama 2 foundation and chat model family — original paper",
        "url": "https://arxiv.org/abs/2307.09288v2",
        "locator": "Abstract and complete bibliographic byline for 2307.09288v2; not an independent proof or experimental replication."
      },
      {
        "title": "Touvron and colleagues: Llama 2 foundation and chat model family — company research page",
        "url": "https://ai.meta.com/research/publications/llama-2-open-foundation-and-fine-tuned-chat-models/",
        "locator": "Source-linked contribution and stated scientific limits; not an independent replication."
      }
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    "roles": [
      {
        "who": "The named authors listed in the linked research record",
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