sui-1: Grounded and Verifiable Long-Form Summarization
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866914251624415232 |
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| author | Droste, Benedikt Harries, Jan Philipp Idahl, Maximilian Plüster, Björn |
| author_facet | Droste, Benedikt Harries, Jan Philipp Idahl, Maximilian Plüster, Björn |
| contents | Large language models frequently generate plausible but unfaithful summaries that users cannot verify against source text, a critical limitation in compliance-sensitive domains such as government and legal analysis. We present sui-1, a 24B parameter model that produces abstractive summaries with inline citations, enabling users to trace each claim to its source sentence. Our synthetic data pipeline combines chain-of-thought prompting with multi-stage verification, generating over 22,000 high-quality training examples across five languages from diverse sources including parliamentary documents, web text, and Wikipedia. Evaluation shows sui-1 significantly outperforms all tested open-weight baselines, including models with 3x more parameters. These results demonstrate that task-specific training substantially outperforms scale alone for citation-grounded summarization. Model weights and an interactive demo are publicly available. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_08472 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | sui-1: Grounded and Verifiable Long-Form Summarization Droste, Benedikt Harries, Jan Philipp Idahl, Maximilian Plüster, Björn Computation and Language Artificial Intelligence Large language models frequently generate plausible but unfaithful summaries that users cannot verify against source text, a critical limitation in compliance-sensitive domains such as government and legal analysis. We present sui-1, a 24B parameter model that produces abstractive summaries with inline citations, enabling users to trace each claim to its source sentence. Our synthetic data pipeline combines chain-of-thought prompting with multi-stage verification, generating over 22,000 high-quality training examples across five languages from diverse sources including parliamentary documents, web text, and Wikipedia. Evaluation shows sui-1 significantly outperforms all tested open-weight baselines, including models with 3x more parameters. These results demonstrate that task-specific training substantially outperforms scale alone for citation-grounded summarization. Model weights and an interactive demo are publicly available. |
| title | sui-1: Grounded and Verifiable Long-Form Summarization |
| topic | Computation and Language Artificial Intelligence |
| url | https://arxiv.org/abs/2601.08472 |