# Migrating off OpenAI-Beta: assistants=v1

**OpenAI** retires **OpenAI-Beta: assistants=v1** on **2024-12-18**.
Documented replacement: **OpenAI-Beta: assistants=v2**.

Source: https://developers.openai.com/api/docs/deprecations
Source last checked: 2026-09-15.
Calendar as of 2026-09-15 UTC.

| Model | Provider | Retires | Replacement |
|---|---|---|---|
| OpenAI-Beta: assistants=v1 | OpenAI | 2024-12-18 | OpenAI-Beta: assistants=v2 |

Source: https://llmlatency.dev/migrate/openai-openai-beta-assistants-v1