AutoGen SelectorGroupChat coordinates twelve jurors with the film case and personas. GPT-4o and Llama-4-Scout are crossed with baseline, an open-minded prompt, and no initial vote, with three replications per cell, temperature .9, and a 150-turn maximum with stopping after three unchanged rounds. Votes, cascades, turns, and flip order are recorded.
18 runs, N=3 in each of six cells. There is no comparable human jury; one films trajectory serves as the narrative reference. 17 of 18 runs ended without unanimity. GPT-4o averaged 1.0, .7, and 1.0 vote changes by condition. Llama averaged 2.0, 3.3, and 6.0 changes. Only one Llama run without an initial vote reached NOT_GUILTY.
Only two models and N=3 are tested. A film is not ground truth for human deliberation. The LLM selector is an uncontrolled confound. RLHF details needed to test the central hypothesis are unavailable. Temperature .9 and persona prompting also affect rigidity. It does not demonstrate that RLHF causes rigidity. It does not establish that Llama deliberates like humans. It does not generalize to other cases, orchestrators, or models.