A 200 Response Is Not a Contract: Canary Tests for Third-Party Model Endpoints
This story is from 2026-11-05. It is preserved in the archive; the latest stories are on the live feed.
A provider can rename a field, change what finish_reason means, or quietly swap the model behind your endpoint. Your client keeps getting HTTP 200 the whole time. Logs look green, and a user is staring at a half-finished sentence with no error attached. This is a testing article, not a model-select…
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- 2026-11-05 16:09 · DEV Community — AI
A 200 Response Is Not a Contract: Canary Tests for Third-Party Model Endpoints