OpenAI said that it would be "making GPT-5 warmer and friendlier based on feedback that it felt too formal before."

"GPT-5 gets more value out of less thinking time. In our evaluations, GPT-5 — with thinking — performs better than OpenAI o3 with 50-80 percent less output tokens across capabilities, including visual reasoning, agentic coding, and graduate-level scientific problem solving," the company wrote in a blog post.