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Openai/6925c674-3858-8009-852a-bd8fdd5679ae
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==== 3. 價格再便宜,沒生態就是「便宜的孤島」 ==== 你說「TPU 價差這麼多」,這句話其實有幾個坑: # 你看到的是 Google 對外報的雲端價目表 / 宣傳 cost-per-token - 那裡面有很多 Google 想要 highlight 的計價方式(例如包成整套服務)。 - 實際上企業做決策,不是只比「單位算力價錢」,還要看: - 遷移成本(改程式、改工具鏈) - 人才成本(會用的人多不多) - 被綁死單一供應商的風險(vendor lock-in) # 生態成本往往比硬體成本更大 - 你公司內部工程師、MLOps、Infra 工程師如果全部都熟 CUDA / GPU,但沒人熟 TPU: - 改成 TPU 代表你要重訓人、重新寫 code、重新建 CI/CD pipeline。 - 對大公司來說,這些人力時間成本,常常遠大於你算那一點「GPU vs TPU 的單價差」。 # TPU 工具鏈主要是 Google 口味(JAX / XLA / TensorFlow) - 但業界很多東西是 PyTorch-first,很多低階最佳化是 CUDA-first。 - 「我整家公司整個 stack 為了 TPU 改過去」這件事,很少人敢下這個決策。 → 便宜很好,但「便宜的東西,大家敢不敢 ALL-IN」是另一個問題。
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