what i found to work well with me is Fable for design / ideas and Sol for implementation. Codex models just tend to be more attentive and follow through instructions. Whereby claude models are weaker on this area (they tend to cut corners).
Claude models tend to cut corners during design/ideation too. It becomes especially visible once you pair Sol as advisor to Fable. Sol will start going crazy - "hey, you said this, and it's actually false, i checked that", or "you need a hash chained, triple encrypted, secure-enclave backed storage for this".
But I actually prefer it this way. Sol is a master of overengineering and being overly scrupulous, so Fable balances this out, and I can always say "don't listen to Sol's advisory" about 50% of the time.
