As in it is a significant step beyond anything I've seen before from an LLM. 5.0 could do more complex reasoning than 4, but could often be dry, 5.1 has no such issues.
https://chatgpt.com/share/692c50cd-59a4-8010-acf0-42b969f15480
https://chatgpt.com/share/692c50cd-59a4-8010-acf0-42b969f15480