OpenAI response metadata

[luca-g-fox]

Is it possible with guidance to get the response metadata's when we use an OpenAI model ?

For instance I would like to compute an estimated price of my prompts and I can do it easily with the OpenAi client :

cached, response = await openai_client.call_or_use_cache(
      model="gpt-3.5-turbo",
      messages=[{"role": "user", "content": prompt}],
      temperature=0,
      stop=["JSON:"],
  )
parsed_res = safe_load_json(response["choices"][0]["message"]["content"])
response["usage"]["price"] = float(
      (response["usage"]["total_tokens"] * 0.002) / 1000
  )