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Kevin Kasaei's avatar

The portability argument holds, and there is a cheap test for whether a company actually has it. On 30 July this year OpenAI cut the price of one model by roughly 80% overnight. Every enterprise on that model got the same email. Only the teams holding their own labelled evaluation set could prove within a week that the cheaper option still passed on their own tasks, and those were the only ones who took the saving. Everyone else stayed on the expensive tier because switching was an unpriced risk rather than a measurement.

So portability is not really an architecture property. It is a measurement property. The abstraction layer is the easy half and plenty of firms have one. The hard half is owning a labelled set of your own cases, with your own pass criteria, that lets you swap the model underneath and prove nothing broke. Gartner puts LLM observability in about 15% of generative AI deployments today. The other 85% cannot answer why an answer came out the way it did, which means they cannot evidence a switch even when the abstraction layer would allow it. Dependency shows up as the inability to prove you can leave, long before any contract says so.

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