Harness vs. Model: Where Specialization Belongs

As agentic systems reach production, teams keep hitting the same fork: push capability into the model through post-training, or into the harness through orchestration, retrieval, and tool use. Panelists from Generationship, Baseten, Fireworks AI, and Paper Compute weigh when fine-tuning pays off, how to choose between open and closed models, and what it takes to serve custom models.