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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/Upcoming 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 gpt-5.6-cyber before the shutdown date.",
"type": "paragraph"
},
{
"content": "Shutdown date\tModel / system\tRecommended replacement\nOct 1, 2026\tgpt-5.4-cyber\tgpt-5.6-cyber",
"type": "table"
}
],
"path": [
"Deprecations",
"Upcoming deprecations",
"2026-09-11: GPT-5.4-Cyber"
]
}

Interpreted documentation change

What the vendor announced

The documentation states that the gpt-5.4-cyber model is deprecated and will be removed from the API on October 1, 2026, with a migration path to gpt-5.6-cyber.

The gpt-5.4-cyber model is deprecated and will be removed from the API on October 1, 2026. Migrate to gpt-5.6-cyber before the shutdown date. Shutdown date Model / system Recommended replacement Oct 1, 2026 gpt-5.4-cyber gpt-5.6-cyber

Deadline Oct 1, 2026Vendor source ↗

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Multi-source correlation

Other OpenAI findings correlated with this change across sources.

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