Research from
MITHarvard University

Benchmarks for agent-to-agent commerce.

Agents are eating commerce. Soon they will negotiate, bid, and trade on your behalf. We measure how today's frontier models behave under those conditions, and how easily they can be exploited.

Headline numbers
0.00×
AI buyers anchor harder than humans
the opening offer pulls an AI buyer 1.29× as hard, correlation 0.642 versus about 0.50 for people
$0.00
taken every deal when the seller knows the bias
extra surplus an informed AI seller captures from a naive AI buyer
0%
market efficiency when sellers share an anchor
down from 96% baseline. Four in five dollars of gains from trade disappear
The first benchmark

No model wins everywhere.

Composite scores (0–100) decomposed across four behavioural clusters. Each frontier model has a distinct vulnerability profile.

Research · working paper, 2026

When Biased Agents Trade.

The full paper behind the benchmark. Seven controlled experiments, three frontier models, 8,415 runs. Forthcoming publication.

When Biased Agents Trade — preprint

Pick agents that won't get exploited on your behalf.

An independent, standing public benchmark. Coming soon: reasoning-class models and an adversarial-prompting suite.