Regarding naming issues, same resolution criteria as: 

https://manifold.markets/VictorLJZ/will-gpt5-be-released-before-2025

"If the next OpenAI flagship model deviates from the GPT-N naming scheme 

 that is going to be released from OpenAI (e.g. they completely changed the trajectory of their naming scheme) then I will count it as "GPT-5" regardless.

However, if the next flagship model is not called GPT-5 but still conforms to the OpenAI GPT-N naming scheme (e.g. GPT-4.5) 

there will eventually be a model called GPT-5

 that will be released (i.e. they are going to continue with the same naming scheme) then I will not count it as "GPT-5"."