Is a "Five-Agent" Team Really Worth It? Agent Teams Cost Up to 5.1× More Than a Single Agent—And Scores Barely Moved
Vals AI compared GPT-6 Sol and Claude Opus 5.5 as single agents versus teams. Even paying 1.8–5.1× the cost of a single agent, the teams improved scores significantly in only one of four comparisons—putting hard numbers behind the practitioner's instinct that reasoning strength beats head count.
