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What is shadow deployment, and how does it differ from canary and A/B testing?

Shadow deployment validates a new model on real traffic without exposing users to it. The signal is knowing outputs are served in parallel then discarded, and how it complements canary and A/B. Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Shadow deployment validates a new model on real traffic without exposing users to it. The signal is knowing outputs are served in parallel then discarded, and how it complements canary and A/B. Here is the answer.

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