Joint text-to-video post-training stops sharing one reward: prompt and generator get separate credit, lifting a matched LTX-2.5 control from 61.47 to 64.46
FlowCred splits the single terminal reward of joint text-to-video post-training into prompt-level credit and prompt-conditioned generator residuals, lifting a strictly matched joint-training control on LTX-2.5 from 61.47 to 64.46 on T2V-CompBench without increasing decoded-video or reward-model-call budgets.