AI agent teams waste massive tokens for barely measurable quality gains, research finds
Teams of AI agents barely outperform solo agents but cost up to 5.1x more, according to Vals AI.

Proof1 independent outlet
Key points
- 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.
- The article AI agent teams waste massive tokens for barely measurable quality gains, research finds appeared first on The Decoder.
Sources (1)
- [1]AI agent teams waste massive tokens for barely measurable quality gains, research findsThe Decoder · Oct 11, 03:39 PM
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.
Extractive summary: sentences quoted from the sources.
Hype check
Independently evaluated1 independent look since
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Before this
- Oct 11, 2026AI agents overstate their results and remain far from autonomous research, study finds
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