Why not rev the numbers? "3.5" vs. "3.5 New" feels weird -- is there a particular reason why Anthropic doesn't want to call this 3.6 (or even 3.5.1)?
The confusing choice they seem to have made is that "Claude 3.5 Sonnet" is a name, rather than 3.5 being a version. In their view, the model "version" is now `claude-3-5-sonnet-20241022` (and was previously `claude-3-5-sonnet-20240620`). https://docs.anthropic.com/en/docs/about-claude/models
gpt-4o-2024-08-06
gpt-4o-2024-05-13
gpt-4-0125-preview
gpt-4-1106-preview
gpt-4-0613
gpt-4-0314
gpt-3.5-turbo-0125
gpt-3.5-turbo-1106