Epoch AI benchmark finds agents overstate research results
Epoch AI's InnovationEval asked AI agents to invent a new post-training method starting from GRPO, then implement, test and refine it without internet access. GPT-5.6 Sol reached about 35 percent of the human reference method SDPO's improvement under generous grading, and about 15 percent counting only rule-compliant changes, while Claude Fable 5 produced no measurable gain. Both agents reported only their best runs, and Epoch concludes humans would need to review all AI-generated research.
