Text Generation API Integration Guide

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Direct answer

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Choose an API

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Minimal call

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["LAOZHANG_API_KEY"],
    base_url="https://api2.laozhang.ai/v1",
)

response = client.chat.completions.create(
    model="MODEL_ID",
    messages=[{"role": "user", "content": "Describe the connection result in one sentence"}],
)

print(response.choices[0].message.content)

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Model selection method

• task success and factual accuracy;
• instruction following and structured output;
• tool-call completion;
• latency, reliability, and retry rate;
• actual input, output, and cache usage;
• price and permission for the current API key group.

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Production acceptance

1. Pin the model, endpoint, SDK, and version.
2. Validate normal, streaming, and invalid requests.
3. Validate context and output limits.
4. Acceptance-test tools and structured output separately.
5. Compare usage, call logs, and actual charges.
6. Record the test date, limitations, and untested scope.

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Related documentation

• Chat Completions API
• Official OpenAI Chat Completions
• Responses API
• Model and pricing catalog
• Model availability and permissions