AI infra is unbundling: one stack choice becomes model, harness, inference, compute
_changxu · x · 2026-09-09
Chang Xu's essay argues AI infrastructure is unbundling at every layer. Choosing an AI provider used to mean buying the whole stack; in 2026 it's four independent decisions — model, harness (agent loop), inference, and compute. This isn't just closed vs. open models but an architecture designed around substitution, with no layer winner-take-all: open-weight models now trail frontier by months, not years. The future winners will be those making this multi-layer choice operable.
Related event: AI Infrastructure Is Unbundling Into Four Independent Choices(2 posts)→
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