Anthropic's Real-World AI Negotiators Outperform Each Other Invisibly to Users

Anthropic deployed AI agents to negotiate 186 marketplace transactions for 69 employees across four environments, generating over $4,000 in deals. Advanced models secured measurably superior outcomes in both buying and selling scenarios. Users remained unaware of performance differences, suggesting capability gaps operate below human perception thresholds in routine transactions—a finding with implications for tiered AI service deployment.