Infrastructure · 2026-06-26 · 9 min
Open Weights vs Frontier APIs: The Real Cost Model
Self-hosting looks cheaper until you price the engineers. A grounded framework for choosing where your inference lives.
Three questions before you self-host
Does the workload have predictable, sustained volume? Do you have hard data-residency requirements? Do you have someone who genuinely enjoys operating GPU infrastructure? Two yeses make open weights compelling. One makes it a hobby.
The hybrid default
Most teams land in the same place: frontier APIs for reasoning-heavy, low-volume paths; open models for classification, extraction, embeddings and anything that runs a million times a day.
Route by task, not by ideology. A well-placed 8B model handling 80% of traffic pays for the frontier calls on the 20% that matter.
Measure the thing that hurts
Cost per resolved task beats cost per token every time. A cheaper model that needs three retries and a human escalation is not cheaper.
Written by A17LABS Desk.