GPUクラウド比較：Runpod/Vast.ai/Lambdaで生成AIコストを1/3にする ...
GPUクラウド比較：Runpod/Vast.ai/Lambdaで生成AIコストを1/3にする
結論
生成AIの学習・推論を回すなら、大手クラウド（AWS/GCP）のオンデマンドGPUは割高だ。同じ A100 80GB でも、Vast.ai のコミュニティ枠なら 1/3〜1/4 に下がる。優先順位はこうだ。
最安・短時間ジョブ → Vast.ai（相場 $0.6〜1.2/h・A100 80GB）
安定運用・本番推論 → Runpod Secure Cloud（$1.5〜2.0/h、永続ボリューム）
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