utils/openai_api.py

import os
from openai import OpenAI

# Ensure you set your API token in your environment variables or pass it directly
OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")  # Make sure it's set in your environment

if OPENAI_API_KEY is None:
    raise ValueError("Hugging Face API token is missing. Set it as an environment variable: OPENAI_API_KEY")


# Initialize the OpenAI client using the API keys
client = OpenAI(api_key=OPENAI_API_KEY)

EMBEDDING_MODEL = "text-embedding-3-large" # "text-embedding-3-small" 

def get_embedding(text: str, model: str=EMBEDDING_MODEL) -> list[float]:
    """Get text embeddings from OpenAI."""
    result = client.embeddings.create(
      model=model,
      input=text
    )
    return result.data[0].embedding

COMPLETIONS_MODEL = "gpt-4o-mini"# "gpt-3.5-turbo-instruct" used earlier .

def get_response(messages: list[dict], model: str=COMPLETIONS_MODEL, 
                temperature=0, max_completion_tokens=800) -> str:
    """Chat completion using OpenAI's GPT models.
    https://platform.openai.com/docs/api-reference/chat/create """
    response = client.chat.completions.create(
        model=model,
        messages=messages,
        max_completion_tokens=max_completion_tokens,
        temperature=temperature,
        # stream=True
    )
    return response.choices[0].message.content