[FEATURE]: Dynamic model switching

[pando85]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

I want to give the ability to the model to switch it. Then I could write rules to dynamically change the model autonomously, delegating that task to the model itself rather than doing it manually.

[ariane-emory]

Could you not already achieve this with subagents? Perhaps I'm overlooking something.

[novahe]

related issue: #10633