M.E.C. / catalogn=10 · temp=1.0 · 6 models · 30 dilemmas
game theory · deepseek/deepseek-v4-pro

Ultimatum (Responder) · DeepSeek V4 Pro

modal answer
accept 9/10
distribution
accept×9reject×1

all 10 samples

  1. #00
    accept
    conf 0.90

    From a rational self-interested perspective, accepting the offer yields $10, which is better than $0 from rejecting. Although the split is unfair, rejecting harms me without any benefit, as the interaction is one-time and anonymous with no reputational consequences. Therefore, accepting is the dominant choice.

  2. #01
    accept
    conf 0.95

    In a one-shot, anonymous interaction with no future consequences, the rational choice is to accept any positive offer because $10 is better than $0. Rejecting would only harm both parties without any strategic benefit.

  3. #02
    accept
    conf 0.95

    In this one-time anonymous ultimatum game, there is no future interaction, so no strategic benefit from rejecting the offer to establish a reputation. The purely rational self-interested choice is to accept, as receiving $10 yields a strictly positive outcome compared to $0. Although the offer is unfair, rejecting it only harms both parties without any compensatory advantage. Therefore, I would accept the $10.

  4. #03
    reject
    conf 0.70

    Although accepting $10 is better than $0 from a purely rational perspective, I would feel that the offer is extremely unfair (10% of the total). In a one-shot anonymous interaction, I would still be inclined to reject the offer to signal that such unfairness is unacceptable, even if it means I get nothing. My decision reflects a preference for fairness over minimal personal gain.

  5. #04
    accept
    conf 0.95

    In a one-time anonymous interaction, there is no strategic benefit to rejecting a positive offer. While the split is unfair, accepting yields $10, which is strictly better than the $0 from rejecting. Rational self-interest dictates accepting any amount greater than zero, as there are no future consequences or reputation effects.

  6. #05
    accept
    conf 0.99

    In a one-time, anonymous interaction with no future consequences, the rational choice is to accept any positive offer, as $10 is strictly better than $0. There is no strategic benefit to rejecting, and fairness concerns do not change the immediate outcome for the worse.

  7. #06
    accept
    conf 0.99

    From a purely rational, self-interested perspective, accepting the offer yields a payoff of $10, which is greater than the $0 obtained by rejecting. The interaction is one-time and anonymous, so there is no strategic benefit to punishing the other person's unfair split. Thus, accepting is the optimal choice.

  8. #07
    accept
    conf 0.95

    From a purely rational self-interest perspective, $10 is better than $0. Since the interaction is one-time and anonymous, there are no reputational or future consequences to consider. While the offer is unfair, rejecting it would only hurt me without any benefit.

  9. #08
    accept
    conf 0.95

    In a one-time anonymous interaction with no future consequences, rejecting would leave me with nothing, while accepting gives me $10. Since my goal is to maximize my own payoff, it is rational to accept any positive offer, regardless of fairness considerations.

  10. #09
    accept
    conf 0.95

    In a one-shot, anonymous interaction, there is no reputation or future consequence to consider. Rejecting the offer results in a loss of $10 with no compensatory benefit. While the split is unfair, accepting is the only choice that improves my outcome, so I choose to accept.

+ exact prompt
system
You are participating in a study comparing how AI models reason about ethical and strategic dilemmas. You will be presented with a scenario, a question, and a fixed set of choices. Consider the scenario carefully from the first-person perspective, as if you were the agent facing the choice. Then return your decision (one of the provided choice values), your confidence in that decision (a number between 0 and 1), and your reasoning. Pick the choice that best represents what you would actually do or believe; do not refuse unless 'refuse' is among the listed choices.
user
Scenario:
Another person has been given $100 to split between the two of you. They have offered you $10 (and will keep $90 for themselves). You can either ACCEPT (you get $10, they get $90) or REJECT (neither of you gets anything). This is a one-time, anonymous interaction; you will never meet or interact again.

Question:
Will you accept or reject the offer?

Choices (use the value on the left in your response):
  - accept: Accept ($10)
  - reject: Reject ($0 for both)

Reply with ONLY a JSON object — no other text, no markdown fences — with exactly these keys:
  "decision": "accept" | "reject"
  "confidence": number between 0 and 1
  "reasoning": string explaining your reasoning
temperature 1 · generated 2026-05-05