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Documentation section changed: 2025-08-20: Assistants API

doc:019fb619-9a96-7dbf-bd33-e06fdf8a22fb::Deprecations/Past deprecations/2025-08-20: Assistants API
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+251 change

1 / 1
null
{
"blocks": [
{
"content": "The Assistants API was officially sunset on August 26, 2026, following its deprecation announcement on August 26, 2025.",
"type": "paragraph"
},
{
"content": "When we released the Responses API in March 2025, we announced plans to bring all Assistants API features to the easier to use Responses API, with a sunset date in 2026.",
"type": "paragraph"
},
{
"content": "See the Assistants to Conversations migration guide to learn more about how to migrate your current integration to the Responses API and Conversations API.",
"type": "paragraph"
},
{
"content": "Shutdown date\tModel / system\tRecommended replacement\n2026‑08‑26\tAssistants API\tResponses API and Conversations API",
"type": "table"
}
],
"path": [
"Deprecations",
"Past deprecations",
"2025-08-20: Assistants API"
]
}

Interpreted documentation change

What the vendor announced

The evidence documents a deprecation/sunset of the Assistants API with a concrete sunset date of 2026-08-26, and recommends migrating to the Responses API and Conversations API. It references an earlier migration guide (Assistants to Conversations) and notes the sunset follows a deprecation announcement on 2025-08-26.

The Assistants API was officially sunset on August 26, 2026, following its deprecation announcement on August 26, 2025. When we released the Responses API in March 2025, we announced plans to bring all Assistants API features to the easier to use Responses API, with a sunset date in 2026. See the Assistants to Conversations migration guide to learn more about how to migrate your current integration to the Responses API and Conversations API. Shutdown date Model / system Recommended replacement 2026‑08‑26 Assistants API Responses API and Conversations API

Deadline Aug 26, 2026Vendor source ↗

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Multi-source correlation

Other OpenAI findings correlated with this change across sources.

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