DeepSeek V4.1 Flash Integration SOP: Five-Step Migration
A five-step SOP for taking DeepSeek V4.1 Flash into production: (1) decide what should and should not migrate - leave production paths that depend on quirky legacy-model behavior alone for now; (2) a pre-migration checklist - inventory every config, env var and hardcoded string where the model name appears, and prepare a representative prompt set as a regression baseline; (3) the five migration steps - switch the model name to deepseek-flash (centrally managed, not scattered hardcoding), run a minimal verification script, diff outputs against the old model with attention to format stability and instruction following, roll out gradually behind a rollback switch, then watch failure rate, retry rate and output-length distribution; (4) tie it to agent workloads by comparing token consumption before and after the switch on the same batch of long-trajectory tasks, verifying the claimed KV Cache compression yourself rather than taking launch copy at face value; (5) six pitfalls and a ten-item launch checklist. Every price, rate limit and window figure is marked "refer to the official documentation" rather than invented.