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When Chat Templates Go Wrong

This story is from 2026-10-01. It is preserved in the archive; the latest stories are on the live feed.

A model running locally loads cleanly and answers correctly, then keeps generating past its answer, stops following the system prompt, or drops an instruction it followed a turn earlier. The same model served through a hosted API behaves normally. This behavior usually traces back to the chat templ…

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  1. 2026-10-01 08:59 · DEV Community — AI
    When Chat Templates Go Wrong

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