Why do gpt-5.1 and gpt-5.4-mini behave so differently in production chatbot use cases?

merefield: > This is a valid concern … look at this graph as an example: Very interesting topic and information, thank you. I am testing reasoning.effort in gpt-5.4-mini with some customers in a real case scenario. Small companies, different subjects to know how it will work. I will return here to share what I observed about it in the next week.