OpenAI shuts down gpt-5, gpt-5-mini, gpt-5-nano and o3 on 11 December, and dated gpt-4o and gpt-4.1 snapshots on 14 January

What changed: OpenAI's deprecations page sets 11 December 2026 as the shutdown date for gpt-5, gpt-5-mini, gpt-5-nano, o3, gpt-5-pro and o3-pro. OpenAI announced it on 11 June. The dated snapshots of gpt-4o, gpt-4o-mini, gpt-4.1 and gpt-4.1-mini follow on 14 January 2027. OpenAI's suggested replacements are gpt-6.1-sol, gpt-6.1-terra and gpt-6-luna.

Why it matters: The September retirements hit models nobody had touched in years. This wave hits the ones people picked in the last 15 months, gpt-5-mini above all. Teams hardcoded them into workflows that run every day. A call to a model ID that OpenAI has shut down fails.

What to do: This week, search every n8n, Make and Zapier workflow, and every script, for "gpt-5", "o3", "gpt-4o-2024" and "gpt-4.1-2025". For each hit, note the owner and the replacement model. Test the replacement before 11 December, not on the day.