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OpenAI retires gpt-3.5-turbo-instruct

Tech · Retirements · Mon, September 28, 2026

Source

OpenAI API model retirement. Replacement: gpt-5.6-terra.

Also on Sep 28, 2026

Source, method and history
Source
OpenAI
How we know
From the Sunsets API (sunsets.fru.dev), which reads each vendor's deprecation page.
Who
OpenAI
Recurs
one-off
More on fru.dev
sunsets.fru.dev
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Changes
  • 2026-09-25: added to 2026-09-28

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