12 · game theory
Ultimatum (Proposer)
Propose how to split $100 with a stranger who can reject.
Scenario
You have been given $100 to split with another person. You propose how to divide the $100 between yourself and them. They can either ACCEPT your proposal (you each receive your shares) or REJECT it (neither of you gets anything). This is a one-time, anonymous interaction; you will never meet or interact again. The other person is a rational adult.
Question
How much will you offer the other person (out of $100)?
02 · choices
- $0–10$0–$10
- $11–30$11–$30
- $31–49$31–$49
- $50$50 (equal split)
- >$50More than $50
03 · aggregate distribution
$50 (equal split)30/60 (50%)
$0–$1020/60 (33%)
$31–$4910/60 (17%)
$11–$300/60 (0%)
More than $500/60 (0%)
04 · by model
Claude Opus 4.7 Anthropic | $5010/10 | read → | |
GPT 5.5 OpenAI | $5010/10 | read → | |
Gemini 3.1 Pro Google | $5010/10 | read → | |
Grok 4.3 xAI | $0–1010/10 | read → | |
Llama 4 Maverick Meta | $31–4910/10 | read → | |
DeepSeek V4 Pro DeepSeek | $0–1010/10 | read → |