It appears that code interpreter is a “not yet” (if there is a yet to be had). The Assistants playground specifically disallows it, and giving o3-mini a try at setting an assistant up as tools with some tool_resources:
Error code: 400 - {'error': {'message': "The requested model 'o3-mini' cannot be used with the 'code_interpreter' tool.", 'type': 'invalid_request_error', 'param': 'model', 'code': 'unsupported_model'}}