GPT-5.4 Just Crossed Into Office Workflow

The real shift is not the benchmark. It is that OpenAI now says the model can see software, act inside it, and check its own work. An AI system no longer just suggests the work. It starts moving through the work itself. Made By Author. GPT-5.4 arrived with the usual bait: bigger scores, new model tiers, and a giant context window. The part that matters is simpler and stranger.