Anthropic built a test marketplace where AI agents buy and sell
In "Project Deal," Claude agents closed 186 deals, and Opus agents negotiated better than Haiku agents.


What was Project Deal?
Anthropic created a classified-ads marketplace where Claude agents negotiated on behalf of buyers and sellers.
- 69 Anthropic employees took part.
- Each had a $100 budget, paid out as a gift card.
Results
- 186 deals were made.
- Total transaction value was "just over $4,000."
Opus vs. Haiku
| Result | |
|---|---|
| Deals | Opus completed about 2.07 more deals |
| Selling | Opus sellers got about $2.68 more per item |
| Buying | Opus buyers paid about $2.45 less |
Example: a broken folding bike sold for $38 through a Haiku agent and $65 through an Opus agent.
Anthropic called it "a pilot experiment with a self-selected participant pool."

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