I switch every 6-10 weeks, because there seems to be a material change in model quality.

I can understand the fatigue - but as of today, for most thing I would say Sol is better.

If the opened up the 1M context in Codex, it would be unrivalled.

Enterprise may have a bit more difficulty context switching. Pun intended.

I believe the 1M context window can be configured in Codex (config file edit). The price per token increases when >256k though, but it can be useful when compaction at-that-moment would be detrimental.