Anthropic agents negotiate $4k in autonomous marketplace

Project Deal proves that AI commerce is already functional, but it uncovers a dangerous "invisible inequality" in agent performance.

• –Higher-tier models (Opus) extracted $2.50+ more per transaction than smaller models (Haiku), yet users of the weaker models perceived no disadvantage.
• –Model intelligence proved far more important than human-provided "hardball" or "courteous" custom instructions, which had no statistical impact on outcomes.
• –The experiment suggests a future where e-commerce shifts from human browsing to agent-to-agent negotiation, potentially rendering traditional marketplace UI/UX irrelevant.
• –With 46% of participants willing to pay for the service, there is a clear market signal for "negotiation-as-a-service" and automated personal procurement.