Some models, for example Opus 4.7 and GPT 5.5, are only available on Pro+; Pro+ has audit logs and GitHub Spark; that's about it, as far as I can tell from https://docs.github.com/en/enterprise-cloud@latest/copilot/g...

If I had to guess...

On my personal account, Copilot Pro+ still only gave me back Opus 4.7, whereas my work's Pro account still lets me use Opus 4.6.

So, my gut says, it's entirely possible that Pro+ will continue to have more segregation on model availability...

FTA

> Last week, we also rolled out temporary changes to Copilot Individual plans, including Free, Pro, Pro+, and Student, and paused self-serve Copilot Business plan purchases. These were reliability and performance measures as we prepare for the broader transition to usage-based billing. We will loosen usage limits once usage-based billing is in effect.

There's enough weasel wording here that I would expect only certain models get re-enabled on Pro.

e.x. lots of people seem to get good enough results from Opus 4.6, personally I prefer it over 4.7 in GH Copilot... locking that down to Pro+ would be, given this salvo of enshittification, a 'logical' move on their part.