How-ToDevelopersAugust 2, 2026

DeepSeek-V4-Flash-0731 prompt caching behavior explained

DeepSeek-V4-Flash-0731 lacks a mid-conversation system turn, causing system messages to be hoisted to the top of the prompt. Users should avoid inserting system role messages mid-conversation to prevent prompt cache invalidation.

1 source

Daily brief

Get tomorrow's AI brief in your inbox

More stories today

Open the live feed