A diagram illustrates a two-stage workflow for processing an input. Stage 1, labeled 'cheap', uses a small model. A conditional rule states that if the output from Stage 1 is not satisfactory, the original input is then processed by a large model in Stage 2, which is labeled 'expensive'. What fundamental trade-off does this workflow primarily aim to optimize?

A diagram shows a two-stage process for handling an input x. In Step 1, a 'Small Model' processes x to produce an output y1. A conditional check follows. If the condition is met, Step 2 is initiated where a 'Large Model' produces a final output y2. What is the direct input to the 'Large Model' in Step 2?

A diagram shows a cascading model workflow where an input is first processed by a small, 'cheap' model. If the result is unsatisfactory, the input is then processed by a large, 'expensive' model. Arrange the following events in the correct sequence for a scenario where the large model is ultimately used.