Independent models
Which model runs a task is a setting — not an architectural lock-in. You stay movable.
Swappable providers
You are not tied to a single model vendor.
Task over brand
Research, drafting and checks can use different models.
Visible cost
Usage is captured and appears clearly in billing.
Spread risk
One vendor outage or price change does not stop operations.
Steer quality
Use stronger models for critical steps without rebuilding the stack.
Proof lives in code and the evidence layer — not only in which model you picked.