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OpenAI API changes
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Documentation section changed: 2026-09-11: GPT-5.4-Cyber

doc:019fb619-9a96-7dbf-bd33-e06fdf8a22fb::Deprecations/Past deprecations/2026-09-11: GPT-5.4-Cyber
Product
OpenAI API
Source
HTML
Change kind
Section Added
Detected
Last updated

Deterministic evidence

Before / after

Extracted from OpenAI's published contract. Open the source ↗

−1+171 change

1 / 1
null
{
"blocks": [
{
"content": "The gpt-5.4-cyber model is deprecated and will be removed from the API on October 1, 2026. Migrate to the most capable cyber model available to you before the shutdown date.",
"type": "paragraph"
},
{
"content": "Shutdown date\tModel / system\tRecommended replacement\nOct 1, 2026\tgpt-5.4-cyber\tThe most capable cyber model available to you.",
"type": "table"
}
],
"path": [
"Deprecations",
"Past deprecations",
"2026-09-11: GPT-5.4-Cyber"
]
}

Interpreted documentation change

What the vendor announced

The evidence states that the gpt-5.4-cyber model is deprecated and will be removed from the API on October 1, 2026. It recommends migrating to the most capable cyber model available to you before the shutdown date. The explicit shutdown date is 2026-10-01, and the recommended replacement is described as 'The most capable cyber model available to you.'

The gpt-5.4-cyber model is deprecated and will be removed from the API on October 1, 2026. Migrate to the most capable cyber model available to you before the shutdown date. Shutdown date Model / system Recommended replacement Oct 1, 2026 gpt-5.4-cyber The most capable cyber model available to you.

Deadline Oct 1, 2026Vendor source ↗

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Multi-source correlation

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