GPT-5.4 vs Claude Opus 4.6: Which AI Wins in 2026?
OpenAI dropped GPT-5.4 on March 5, 2026. Six days later I'm still not sure how I feel about it. I've been a Claude user for months. I use it for coding, writing, and debugging — it's basically open on my second monitor all day. So when GPT-5.4 dropped with claims of "record benchmark scores" and a 1 million token context window, I didn't switch immediately. I tested it.I ran both through the same coding tasks, writing prompts, and reasoning problems I use every day. The results were more nuanced than I expected — and honestly, more useful than any benchmark chart will tell you. Here's what actually changed, what didn't, and which AI you should be using right now depending on what you do.
