The model that retired
Your chatbot stops answering overnight. The logs say the AI model 'does not exist'. It existed yesterday.
This answers: Why does my AI model suddenly not exist? No coding needed. 3 quick decisions.
- Keeping it running
Checking your access…
Why does my AI model suddenly not exist?
AI providers retire older model versions on dates they announce in advance, usually on a deprecations page and by email to the account owner. After the shutdown date, calls to that model fail with an error like model_not_found. Keep the model name in one setting, watch for deprecation notices, and test the replacement before the date.
Breaks at AI provider: Pinned model version was retired
Why AI tools write this bug
Generated code hard-codes the model name that was current when it was written, often in several files, and nothing re-checks it later.
How to fix it
- Find every model name in the code.
3 more steps, and a prompt that checks your own app for this bug. Part of Pro.
UnlockCommon questions
- Should I use a 'latest' model alias?
- It avoids shutdowns, but the model behind it can change without testing, which can change answers, formatting and price. Many teams pin a version and upgrade deliberately.