SocialOmni: Benchmarking Audio-Visual Social Interactivity in Omni Models

Abstract:Evaluating omni-modal large language models (OLMs) in multi-party dialogue requires more than answer correctness on pre-segmented inputs. We introduce SocialOmni, an offline diagnostic benchmark that separates three turn-level decisions: identifying who is speaking, deciding when a designated participant should enter at an annotated query time, and determining how that participant should continue the dialogue. SocialOmni contains 2,000 perception items and a quality-controlled core split of 200 interaction-generation items, including naturally occurring speaker-visibility mismatches. Each item is independently checked by three human annotators. Evaluated systems receive only query-time-bounded multimodal evidence, while manually verified reference continuations are reserved for response judging. A complete three-judge ensemble scores every eligible response, with leave-one-judge-out and family-sensitivity audits. Across 11 OLMs, rankings vary substantially by axis, and coverage-adjusted scores reveal when high conditional response quality depends on selective turn entry. The protocol does not measure persistent streaming state or wall-clock latency.

23 pages, including appendix. Updated evaluation protocol and results; reproducibility materials included as ancillary files. Code: this https URL . Dataset: this https URL

Artificial Intelligence (cs.AI)

arXiv:2603.16859 [cs.AI]

(or arXiv:2603.16859v3 [cs.AI] for this version)