Assistants migration guide

Beta

We have changed the way that tools and files work in the Assistants API between the v1 and v2 versions of the beta. Both versions of the beta continue to be accessible via the API today, but we recommend migrating to the newest version of our APIs as soon as feasible. We will deprecate v1 of the beta by the end of 2024.source

The v2 version of the Assistants API contains the following changes:source

1. Tool rename: The retrieval tool has been renamed to the file_search tool
2. Files belong to tools: Files are now associated with tools instead of Assistants and Messages. This means that:
   • AssistantFile and MessageFile objects no longer exist.
   • Instead of AssistantFile and MessageFile, files are attached to Assistants and Threads using the new tool_resources object.
     • The tool_resources for the code interpreter tool are a list of file_ids.
     • The tool_resources for the file_search tool are a new object called a vector_stores.
   • Messages now have an attachments, rather than a file_ids parameter. Message attachments are helpers that add the files to a Thread’s tool_resources.

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{
  "id": "asst_abc123",
  "object": "assistant",
  "created_at": 1698984975,
  "name": "Math Tutor",
  "description": null,
  "model": "gpt-4-turbo",
  "instructions": "You are a personal math tutor. When asked a question, write and run Python code to answer the question.",
  "tools": [{ "type": "code_interpreter" }],
  "file_ids": [],
  "metadata": {}
}

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{
  "id": "asst_abc123",
  "object": "assistant",
  "created_at": 1698984975,
  "name": "Math Tutor",
  "description": null,
  "model": "gpt-4-turbo",
  "instructions": "You are a personal math tutor. When asked a question, write and run Python code to answer the question.",
  "tools": [
    {
      "type": "code_interpreter"
    },
    {
      "type": "file_search"
    }
  ],
  "tool_resources": {
    "file_search": {
      "vector_store_ids": ["vs_abc"]
    },
    "code_interpreter": {
      "file_ids": ["file-123", "file-456"]
    }
  }
}

Assistants have tools and tool_resources instead of file_ids. The retrieval tool is now the file_search tool. The tool_resource for the file_search tool is a vector_store.source

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{
  "id": "thread_abc123",
  "object": "thread",
  "created_at": 1699012949,
  "metadata": {}
}

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{
  "id": "thread_abc123",
  "object": "thread",
  "created_at": 1699012949,
  "metadata": {},
  "tools": [
    {
      "type": "file_search"
    },
    {
      "type": "code_interpreter"
    }
  ],
  "tool_resources": {
    "file_search": {
      "vector_store_ids": ["vs_abc"]
    },
    "code_interpreter": {
      "file_ids": ["file-123", "file-456"]
    }
  }
}

Threads can bring their own tool_resources into a conversation.source

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{
  "id": "msg_abc123",
  "object": "thread.message",
  "created_at": 1698983503,
  "thread_id": "thread_abc123",
  "role": "assistant",
  "content": [
    {
      "type": "text",
      "text": {
        "value": "Hi! How can I help you today?",
        "annotations": []
      }
    }
  ],
  "assistant_id": "asst_abc123",
  "run_id": "run_abc123",
  "metadata": {},
  "file_ids": []
}

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{
  "id": "msg_abc123",
  "object": "thread.message",
  "created_at": 1698983503,
  "thread_id": "thread_abc123",
  "role": "assistant",
  "content": [
    {
      "type": "text",
      "text": {
        "value": "Hi! How can I help you today?",
        "annotations": []
      }
    }
  ],
  "assistant_id": "asst_abc123",
  "run_id": "run_abc123",
  "metadata": {},
  "attachments": [
    {
      "file_id": "file-123",
      "tools": [
        { "type": "file_search" },
        { "type": "code_interpreter" }
      ]
    }
  ]
}

Messages have attachments instead of file_ids. attachments are helpers that add files to the Thread’s tool_resources.source

All v1 endpoints and objects for the Assistants API can be found under the Legacy section of the API reference.source

To make your migration simple between our v1 and v2 APIs, we automatically map AssistantFiles and MessageFiles to the appropriate tool_resources based on the tools that are enabled in Assistants or Runs these files are a part of.source

Because Assistant Files and Message Files are already mapped to the appropriate tool_resources in v2, when you’re ready to migrate to v2 you shouldn't have to worry about a data migration. Instead, you only need to:source

1. Update your integration to reflect the new API and objects. You may need to do things like:
   • Migrate to creating vector_stores and using file_search, if you were using the retrieval tool. Importantly, since these operations are asynchronous, you’ll want to ensure files are successfully ingested by the vector_stores before creating run.
   • Migrate to adding files to tool_resources.code_interpreter instead of an Assistant or Message’s files, if you were using the code_interpreter tool.
   • Migrate to using Message attachments instead of file_ids.
2. Upgrade to the latest version of our SDKs

Both beta versions can be accessed by passing the right API version header in your API requests:source

1. v1: OpenAI-Beta: assistants=v1
2. v2: OpenAI-Beta: assistants=v2

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curl "https://api.openai.com/v1/assistants" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H "OpenAI-Beta: assistants=v2" \
  -d '{
    "instructions": "You are a personal math tutor. When asked a question, write and run Python code to answer the question.",
    "name": "Math Tutor",
    "tools": [{"type": "code_interpreter"}],
    "model": "gpt-4-turbo"
  }'

Versions of our SDKs that are released after the release of the v2 beta will have the openai.beta namespace point to the v2 version of the API by default. You can still access the v1 version of the API by using an older version of the SDK (1.20.0 or earlier for python, 4.36.0 or earlier for node) or by overriding the version header. source

To install an older version of the SDK, you can use the following commands:source

pip install openai==1.20.0

You can also override this header in a newer SDK version, but we don't recommend this approach since the object types in these newer SDK versions will be different from the v1 objects.source

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from openai import OpenAI

client = OpenAI(default_headers={"OpenAI-Beta": "assistants=v1"})

All vector stores created before the release of the v2 API (April 17, 2024) will be free to use until the end of 2024. This implies that any vector stores that were created as a result of us mapping your v1 data to v2, before the v2 launch will be free. After the end of 2024, they’ll be billed at whatever the fees for vector stores are at that point. See our pricing page for the latest pricing information.source

Any vector store that is created before the release of the v2 API (April 17, 2024) but not used in a single Run between that release date and the end of 2024 will be deleted. This is to avoid us starting to bill you for something you created during the beta but never used.source

Vector stores created after the release of the v2 API will be billed at current rates as specified on the pricing page.source

Deleting Assistant Files / Message Files via the v1 API also removes them from the v2 API. However, the inverse is not true - deletions in the v2 version of the API do not propogate to v1. If you created a file on v1 and would like to "fully" delete a file from your account on both v1 and v2 you should:source

• delete Assistant Files / Message Files you create using v1 APIs using the v1 endpoints, or
• delete the underlying file object — this ensures it is fully removed from all objects in all versions of the API.

The default playground experience has been migrated to use the v2 version of the API (you will still have a read-only view of the v1 version of objects, but will not be able to edit them). Any changes you make to tools and files via the Playground will only be accessible in the v2 version of the API.source

In order to make changes to files in the v1 version of the API, you will need to use the API directly.source