Epoch AI has come under fire for its delayed disclosure of funding from OpenAI related to its FrontierMath benchmark. The nonprofit revealed details only after OpenAI's new AI, o3, was announced, leading to claims of non-transparency from contributors. While Epoch AI's associate director admitted a lack of transparency, he defended the integrity of the benchmark. Concerns have been raised about potential conflicts of interest, as OpenAI had access to benchmark data. Epoch AI aims to maintain objectivity in its evaluations despite the scrutiny.