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OpenAI API changes
Info

Documentation section changed: 2026-10-01: GPT-5.3-Codex, GPT-5.1, GPT-5.4-Nano

doc:019fb619-9a96-7dbf-bd33-e06fdf8a22fb::Deprecations/Upcoming deprecations/2026-10-01: GPT-5.3-Codex, GPT-5.1, GPT-5.4-Nano
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 following models are deprecated and will be removed from the API on April 1, 2027, with six months’ notice. Migrate to the recommended replacements before the shutdown date.",
"type": "paragraph"
},
{
"content": "Shutdown date\tModel / system\tRecommended replacement\nApr 1, 2027\tgpt-5.3-codex\tgpt-6-sol\nApr 1, 2027\tgpt-5.4-nano\tgpt-6-luna\nApr 1, 2027\tgpt-5.1\tgpt-6-sol",
"type": "table"
}
],
"path": [
"Deprecations",
"Upcoming deprecations",
"2026-10-01: GPT-5.3-Codex, GPT-5.1, GPT-5.4-Nano"
]
}

Interpreted documentation change

What the vendor announced

The evidence communicates upcoming deprecations of models gpt-5.3-codex, gpt-5.4-nano, and gpt-5.1 with a shutdown date of April 1, 2027, and lists recommended replacements (gpt-6-sol for gpt-5.3-codex and gpt-5.1; gpt-6-luna for gpt-5.4-nano).

The following models are deprecated and will be removed from the API on April 1, 2027, with six months’ notice. Migrate to the recommended replacements before the shutdown date. Shutdown date Model / system Recommended replacement Apr 1, 2027 gpt-5.3-codex gpt-6-sol Apr 1, 2027 gpt-5.4-nano gpt-6-luna Apr 1, 2027 gpt-5.1 gpt-6-sol

Deadline Apr 1, 2027Vendor source ↗

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Multi-source correlation

Other OpenAI findings correlated with this change across sources.

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