chore: fixed validation and used better model and api

Backend/app/api/v1/endpoints/prompts.py

@@ -23,7 +23,7 @@ GENERATION RULES
 REQUIRED JSON FORMAT FOR EACH QUESTION
 -----------------------
 {{
-    "questions": "Which of the following CLI command can also be used to rename files?",
+    "question": "Which of the following CLI command can also be used to rename files?",
     "options": [
         "rm",
         "mv",

Backend/app/config.py

@@ -16,7 +16,7 @@ class Settings(BaseSettings):
     chroma_port: int
     chroma_collection: str
 
-    GEMINI_API_KEY:str
+    GROQ_API_KEY:str
 
     class Config:
         env_file = ".env"

Backend/app/llm.py

@@ -6,15 +6,15 @@ from app.schema.models import QuizOutput, QuizQuestion
 from app.config import settings
 
 client = OpenAI(
-    base_url="https://generativelanguage.googleapis.com/v1beta/openai/",
-    api_key="AIzaSyAIZJOjjq87FDmW9sVoTuvPkwnmfFWtfNE",
+    base_url="https://api.groq.com/openai/v1",
+    api_key=settings.GROQ_API_KEY
 )
 
 async def call_llm(prompt:str):
     try:
         response = client.chat.completions.create(
             # CRUCIAL: Use the LiteLLM format: 'gemini/gemini-2.5-pro'
-            model="models/gemini-2.0-flash", 
+            model="openai/gpt-oss-20b", 
             messages=[
                 {"role": "user", "content": prompt}
             ],

Backend/app/schema/models.py

@@ -54,11 +54,11 @@ class Quiz_input(BaseModel):
     # choice: Literal["mcq", "code"]
 
 class QuizQuestion(BaseModel):
-    questions: str
-    options: List[str] = Field(..., min_items=4, max_items=4)
-    answer: str  = Field(..., description="The correct answer key (e.g., 'a', 'b', 'c', or 'd')")
-    explanation: str 
-    user_response: str = Field("", alias="User_response")
+    question: str 
+    options: List[str] = Field(..., min_items=2)
+    answer: str = Field(..., description="Correct answer key")
+    explanation: str
+    User_response: str = Field("", alias="User_response")
 
 class QuizOutput(BaseModel):
     quiz: List[QuizQuestion] = Field(..., description="A list of 10 generated MCQ questions.")