Your INT4-quantized model lost too much accuracy. How do you recover it?

Naive 4-bit quantization can tank quality, and the reflex to give up and serve fp16 leaves a big speedup on the table. The accuracy is usually recoverable. Here is the ladder of fixes.

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

Naive 4-bit quantization can tank quality, and the reflex to give up and serve fp16 leaves a big speedup on the table. The accuracy is usually recoverable. Here is the ladder of fixes.

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