GPT-5.4 Just Dropped. Here's What I Think as a Heavy Claude Code User

Yesterday, OpenAI released GPT-5.4. I use Claude Code 12+ hours a day. When a competitor drops a new model that beats Opus 4.6 on several benchmarks, I pay attention. So I spent the evening digging into what actually matters. This isn't a hype piece. It's a developer's honest analysis. GPT-5.4 Is Three Models, Not One First, let's get this straight. GPT-5.4 ships as three variants : Model Think of it as Best for GPT-5.4 Daily driver Chat, code gen, general tasks GPT-5.4 Thinking Off-road vehicle Reasoning-heavy tasks with visible chain-of-thought GPT-5.4 Pro F1 race car Maximum performance, enterprise workloads The Thinking model has an interesting twist: it shows you its plan upfront , so you can redirect mid-response if it's heading the wrong way. Claude's Extended Thinking shows reasoning too, but you can't intervene mid-stream. That's a meaningful difference. Benchmarks: GPT-5.4 Wins on Paper Let's look at the numbers everyone's talking about. Benchmark GPT-5.4 Opus 4.6 Gemini 3.1