Truyền luồng

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://nokeep.ai/v1",
    api_key=os.environ["NOKEEP_API_KEY"],
)

stream = client.chat.completions.create(
    model="deepseek-v4.1-flash-uncensored",
    messages=[{"role": "user", "content": "Tell me a story in three lines."}],
    stream=True,
    stream_options={"include_usage": True},
)
for chunk in stream:
    if chunk.choices:
        print(chunk.choices[0].delta.content or "", end="", flush=True)
    if chunk.usage:
        print("\ncredits:", chunk.usage.model_extra.get("nokeep_credits"))

data: {"choices":[{"index":0,"delta":{"role":"assistant","content":""}}]}
data: {"choices":[{"index":0,"delta":{"content":"The"}}]}
data: {"choices":[{"index":0,"delta":{"content":" lighthouse"}}]}
…
data: {"choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}
data: {"choices":[],"usage":{"prompt_tokens":18,"completion_tokens":61,"nokeep_credits":0}}
data: [DONE]

for chunk in stream:
    text = chunk.choices[0].delta.content if chunk.choices else ""
    if text and "THE END" in text:
        stream.close()  # the model stops here, and so does the bill
        break

data: {"error":{"type":"api_error","code":"stream_cut","message":"The model stopped before it finished. What it wrote is billed, nothing more."}}
data: [DONE]