chatgpt-4o-latest is removed from the API

Announced: 18 Nov 2025
Effective: passed 17 Feb 2026
Source: the vendor’s own page · last checked 23 Sept 2026

What breaks

Any request naming this model returns an error from the removal date. Code that falls back silently on an API error will look fine and answer nothing.

What to do

Move to gpt-5.1-chat-latest.

Advice confirmed 23 Sept 2026

What the vendor said

On 18 November 2025 OpenAI notified developers using the chatgpt-4o-latest model snapshot of its deprecation and removal from the API.

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