app.py

from fastapi import FastAPI
from transformers import pipeline

app = FastAPI()

#pipe = pipeline("text2text-generation", model="google/flan-t5-small")
pipe = pipeline("text2text-generation", model="google/flan-t5-large", max_new_tokens=1000)

@app.get("/")
def home():
    return {"Hello World!"}

@app.get("/generate")
def generate(prompt:str):
    output = pipe(prompt)
    return {"output":output[0]['generated_text']}