TechHuggingFaceabout 2 hours ago
Model Routing Is Simple. Until It Isn't.
1 min read
IBM Research found that model routing is a systems optimization problem, not a classification one. GPT-4.1 cost $155 on AppWorld versus Claude Sonnet 4.6 at $79, despite lower sticker pricing, because caching and infrastructure factors dominate actual cost, latency, and complexity.
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