What this layer means
Foundation models are the raw material of the current era.
Our engagement with them is at the working level, not the benchmark level:
Selection
Given an application constraint (latency, cost, task difficulty, failure tolerance), which model class is the right fit? This rarely has a single answer.
Routing
Production applications almost always route across multiple models. A cheaper, faster model handles most requests; a more capable model handles the hard tail; a specialized model handles a domain subset.
Failure characterization
We treat model outputs as a distribution, not a point. Understanding the failure modes — hallucination patterns, instruction-following boundaries, context-length degradation — is more valuable than the headline benchmark.