openai.beta.chat.completions.stream(chatRequest).finalChatCompletion() throws missing finish_reason error for gpt-4o-audio-preview streaming.

[davit-b]

Confirm this is a Node library issue and not an underlying OpenAI API issue

• This is an issue with the Node library

Describe the bug

gpt-4o-audio-preview streamed final return chunk doesn't contain finish_reason and the finalizeChatCompletion method cannot handle it properly

data: {"id":"chatcmpl-123456","object":"chat.completion.chunk","created":1730764995,"model":"gpt-4o-audio-preview-2024-10-01","system_fingerprint":"fp_6e2d124157","choices":[{"index":0,"delta":{"audio":{"transcript":"!"}},"finish_reason":null}]}

data: {"id":"chatcmpl-123456","object":"chat.completion.chunk","created":1730764995,"model":"gpt-4o-audio-preview-2024-10-01","system_fingerprint":"fp_6e2d124157","choices":[{"index":0,"delta":{"role":"assistant","content":null,"refusal":null,"audio":{"id":"audio_672960c3a3e48190aed70377a7d6c941","data":"CAAIAAkACgAPABEAEQARABMAEAANAAgAAwD9//v/+f/3//L/8v/w//L/8"}},"finish_reason":null}]}

data: {"id":"chatcmpl-123456","object":"chat.completion.chunk","created":1730764995,"model":"gpt-4o-audio-preview-2024-10-01","system_fingerprint":"fp_6e2d124157","choices":[{"index":0,"delta":{"audio":{"data":"lBNbDTYZdhycFrgTxg6NBT8BavhC85LyNu/j9Yv8DvqAAuA"}},"finish_reason":null}]}

data: {"id":"chatcmpl-123456","object":"chat.completion.chunk","created":1730764995,"model":"gpt-4o-audio-preview-2024-10-01","system_fingerprint":"fp_6e2d124157","choices":[{"index":0,"delta":{"audio":{"data":"J/6d/nsAkAE3/xv7U/jp9ur0bPRY+DH//v//v8IAAcAEgALABsAFAANAAsA//8IAP//8//y//T/7//3//v/+v8TABsADgAdACIAPAACAPn//f/j/zAAIQATADIAQgBbAAwA+f/z/wgA/v8YABkAOAAjANn/"}},"finish_reason":null}]}

data: {"id":"chatcmpl-123456","object":"chat.completion.chunk","created":1730764995,"model":"gpt-4o-audio-preview-2024-10-01","system_fingerprint":"fp_6e2d124157","choices":[{"index":0,"delta":{"audio":{"expires_at":1730768595}}}]}

See how the final only has an expires_at and doesn't have a finish_reason

To Reproduce

const chatRequest = {
                messages: chatRequestMessageList,
                model: "gpt-4o-audio-preview",
                modalities: ["text", "audio"],
                audio: { voice: "alloy", format: "pcm16" },
                max_tokens: COMPLETION_RESPONSE_SETTING,
                temperature: 0.7,
                top_p: 1,
                stream: true,
                tools: request.body.tools,
                tool_choice: request.body.toolChoice,
            }
const stream = openai.beta.chat.completions.stream(chatRequest)
...
const finalChatCompletion = await stream.finalChatCompletion();

throw error

Error in the streaming of response: OpenAIError: missing finish_reason for choice... at finalizeChatCompletion ... at ChatCompletionStream._ChatCompletionStream_endRequest.....at ChatCompletionStream._createChatCompletion.... at process.processTicksAndRejections..... at async ChatCompletionStream._runChatCompletion....node_modules/openai/lib/AbstractChatCompletionRunner.js:135:16

Code snippets

No response

OS

macOS

Node version

node 18

Library version

4.73.1