Cooperation Without Adaptation: LLM Agents in a Collective-Risk Dilemma
Language-model agents are increasingly deployed to act on behalf of people in settings where individual decisions shape shared outcomes. We examine whether five production models adapt their contributions to changing risks and partner behaviour, or instead follow a relatively fixed strategy. In a collective-risk dilemma game (CRG), six players contribute to a shared pool over ten rounds; if the pool falls short of its target, a catastrophe may destroy their remaining resources. Four models contributed approximately an equal share at every positive risk level, and four of the five also contributed when risk was zero, even though contributing could not improve their payoff. Explicitly stati...
| Authors | Trung-Kiet Huynh, Dao-Sy Duy-Minh, Chi-Nguyen Tran et al. |
|---|---|
| Primary category | cs.GT |
| Published | 16 October 2026 |
| Last updated at source | 16 October 2026 |
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