Please add stream_options in langchain/openai interface

[kangyeop]

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Example Code

import { OpenAI } from '@langchain/openai';

const model = new OpenAI({
  ...modelConfig,
});

await model.stream(prompt, {
  streamOptions:{
    tokenUsage:true
  },
});

Description

When I make an openai request, I can't get the token usage from the callbackHandler if I request it as a stream.
For this reason, openai added a new option, stream_options option.
openAI added that option to the openai 3 weeks ago, is it possible to update it?

https://platform.openai.com/docs/api-reference/chat/create#chat-create-stream_options
https://github.com/openai/openai-node/releases/tag/v4.42.0

System Info

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