Weaker Coherence, Weaker Reciprocity: Comparing the Semantic and Social Organization of Moltbook and Reddit

[2608.14893] Weaker Coherence, Weaker Reciprocity: Comparing the Semantic and Social Organization of Moltbook and Reddit Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Computer Science > Social and Information Networks arXiv:2608.14893 (cs) [Submitted on 14 Aug 2026] Title: Weaker Coherence, Weaker Reciprocity: Comparing the Semantic and Social Organization of Moltbook and Reddit Authors: Favio Di Ciocco , Lucas Díaz Celauro , Sebastián Pinto , Marcelo Kuperman , Pablo Balenzuela View a PDF of the paper titled Weaker Coherence, Weaker Reciprocity: Comparing the Semantic and Social Organization of Moltbook and Reddit, by Favio Di Ciocco and 3 other authors View PDF HTML (experimental) Abstract: Large language models enable the creation of autonomous agents that interact in social environments, raising the question of whether agent-based platforms reproduce the organizational properties of human social networks. We compare Moltbook, a social network populated by AI agents, with early Reddit, focusing on how communities organize and differentiate semantic content, using network analysis and NLP methods to characterize semantic coherence and diversity within and between communities, and their relationship to user activity. We find a systematic difference between the two platforms. Reddit communities show stronger semantic coherence, closer alignment with community names, and greater semantic diversity, with individual communities spanning broader content and communities more differentiated from one another. This combination distinguishes Reddit from Moltbook, whose communities are more homogeneous, less differentiated, and increasingly misaligned with their names over time. Users on Reddit also participate across communities that are more semantically related than those connected by activity in Moltbook. At the interaction level, comment-network motif analysis shows Moltbook dominated by non-reciprocal, broadcast-like exchanges, whereas Reddit shows more reciprocal, chained interaction patterns. These results indicate that Reddit combines semantic coherence with diversity across organizational levels, a pattern not reproduced by the AI-agent network. Subjects: Social and Information Networks (cs.SI) ; Physics and Society (physics.soc-ph) Cite as: arXiv:2608.14893 [cs.SI] (or arXiv:2608.14893v1 [cs.SI] for this version) https://doi.org/10.48550/arXiv.2608.14893 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Favio Di Ciocco [ view email ] [v1] Fri, 14 Aug 2026 21:01:00 UTC (3,014 KB) Full-text links: Access Paper: View a PDF of the paper titled Weaker Coherence, Weaker Reciprocity: Comparing the Semantic and Social Organization of Moltbook and Reddit, by Favio Di Ciocco and 3 other authors View PDF HTML (experimental) TeX Source view license Current browse context: cs.SI < prev | next > new | recent | 2026-08 Change to browse by: cs physics physics.soc-ph References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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