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AI agent teams waste massive tokens for barely measurable quality gains, research finds

Science · en

AI agent teams waste massive tokens for barely measurable quality gains, research finds

The Decoder · Oct 11, 2026, 3:39 PM UTC

Teams of AI agents barely outperform solo agents but cost up to 5.1x more, according to Vals AI. Only one out of four tests with GPT-6 Sol and Claude Opus 5.5 showed a measurable gain. Anthropic's own data backs this up: beyond ten agents, quality plateaus while token costs keep climbing.…