Making Your First LLM API Call

Code

import os
from openai import OpenAI
client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
out = client.chat.completions.create(
 model="gpt-4o-mini",
 messages=[
  {"role":"system","content":"Be concise. Answer only from context."},
  {"role":"user","content":"Summarize RAG in 2 lines."}
 ],
 temperature=0.2,
)
print(out.choices[0].message.content)

Add timeout, retry on 429/5xx, log usage. Next: tune temperature/top-p.