❯ DeepSeek V4.1 Flash Exposes Day-One Support Gap as Nvidia Runs vLLM Across Six GPU Families

Day-one supportSemiAnalysis said Nvidia vLLM ran DeepSeek V4.1 Flash out of the box across six GPU families on release day: H100, H200, B200, B300, GB200 and GB300. At the same point, a corresponding image referenced in AMD documentation had not been made public.

Engineering gapIn SemiAnalysis’s day-one test, production readiness depended on inference frameworks, kernels and container images arriving together, not only peak hardware performance. Nvidia and its partners enabled immediate testing. AMD’s missing public image delayed like-for-like workloads, though an observation within 23 hours cannot establish a long-term performance gap.

Developer choiceThe first 24 hours form the initial test window for clouds and developers. Compute platforms compete on model availability and tooling completeness. AMD’s image timing and subsequent throughput and cost tests will show whether the early gap persists.

▪ SIGNALNew-model support has become an hourly contest; a usable day-one image can influence developer choice as much as hardware specifications.