Should an API endpoint be added to delete a message from a conversation thread?

Yes, there is an API call to remove a message. OpenAI provides a dedicated endpoint that lets you delete a specific message by its message ID within a specified thread. When you call this endpoint, the message gets removed (i.e., marked as deleted) from the conversation thread.

For example, using cURL you can execute a DELETE request like this:

BASHCopied
curl -X DELETE https://api.openai.com/v1/threads/thread_abc123/messages/msg_abc123 \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "OpenAI-Beta: assistants=v2"

The response indicates successful deletion:

JSONCopied
{
  "id": "msg_abc123",
  "object": "thread.message.deleted",
  "deleted": true
}

This API design allows you to manage thread content without needing to explain why a response was unhelpful or to rebuild the entire thread history. It's a more straightforward way to handle scenarios where a message is determined to be a "bad response" by an evaluation function.