How do you defend an LLM service against resource-exhaustion and denial-of-service attacks?

An attacker doesn't need to breach your LLM to hurt you, just make it do expensive work. A handful of crafted prompts can pin your GPUs and run up the bill. The defense is not a bigger rate limit.

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

An attacker doesn't need to breach your LLM to hurt you, just make it do expensive work. A handful of crafted prompts can pin your GPUs and run up the bill. The defense is not a bigger rate limit.

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