Dmytro Galko · open-source tools
What in your repo stops working, and when
On 23 October 2026 OpenAI retires twenty-nine model identifiers in one day; four more went on 28 September, twenty-five days earlier. GitHub code search puts 96,640 files on gpt-4-0613 alone and 86,528 on gpt-4-turbo in Python. Every one is a hardcoded string that starts returning an error on a published date, and nothing warns first. This answers the only question that matters first: does it affect me, and how long have I got — across OpenAI, Anthropic and Google, 183 identifiers from three published schedules.
Run against a real agent repository on 21 September 2026 it found davinci-002 seven days from retirement and gpt-3.5-turbo in seven places thirty-two days out, each with file and line, and exited 1. Twenty-three tests, including one per live look-alike and one that Google's own page chains eight models to a replacement that is itself retired.
openai model deprecation checker, gpt-4-0613 retired october 2026, find hardcoded retired model ids, gpt-3.5-turbo shutdown date, migrate off retired gpt models, deprecation scanner CI.
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