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Openai/69747865-1f8c-8006-b944-019c41b1784a
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==== 4) 「過学習してない」の主張(ホールドアウトの切り分け) ==== この投稿の肝はここです。 * Tier 4の48問は、事情により 2つの集合に分かれている: - OpenAIが問題と解答に独占アクセスできる28問(= 非ホールドアウト) - Epochが非公開で保持する20問(ホールドアウト) * GPT-5.2 Proは - 非ホールドアウト:5/28 = 18% - ホールドアウト:10/20 = 50% * つまり「OpenAIが中身を知り得る側で強く、未知側で弱い」という 過学習っぽいパターンではなく、むしろ逆。 → “over-fitting(過学習)の証拠はない” と結論しています。 (ただし、ここは“証拠がない”という言い方で、統計的に厳密な証明というより「少なくとも疑う材料は見えない」程度のニュアンスです。)
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