作为企业级 AI 应用负责人,我曾在生产环境中遭遇过无数次 API 调用风暴——凌晨3点流量突增、第三方模型服务宕机、账单超出预算30%却找不到根源。这些问题促使我深入研究企业级 AI 网关的压测与高可用方案。今天这篇文章,我将分享如何用 HolySheep AI 构建一套完整的企业级 AI 网关,通过压测验证并发限流、失败重试、降级模型与审计追踪四大核心能力。

为什么企业需要 AI 网关?HolySheep vs 官方 API vs 其他中转站对比

对比维度官方 API其他中转站HolySheep AI
汇率成本 ¥7.3=$1(官方汇率) ¥6.5-7.0=$1(略有损耗) ¥1=$1 无损(节省 >85%)
国内延迟 200-500ms(需科学上网) 80-150ms <50ms(国内直连)
并发限流 官方默认限流,无企业控制台 基础限流,无细粒度控制 支持 RPM/TPM 自定义限流
失败重试 需自行实现 基础重试,无智能降级 智能重试 + 自动降级模型
审计追踪 无完整日志 简单日志 请求级审计 + 成本追踪
充值方式 美元信用卡 部分支持人民币 微信/支付宝直充
注册优惠 少量试用额度 注册送免费额度

适合谁与不适合谁

适合使用 HolySheep 企业网关的场景:

不适合的场景:

价格与回本测算

HolySheep 2026 年主流模型 output 价格(每百万 Token):

模型Output 价格对比官方节省
GPT-4.1$8.00/MTok节省约 85%
Claude Sonnet 4.5$15.00/MTok节省约 75%
Gemini 2.5 Flash$2.50/MTok节省约 70%
DeepSeek V3.2$0.42/MTok节省约 80%

回本测算示例:

假设企业月均消耗 500 万 Token(以 GPT-4.1 为例):

为什么选 HolySheep

我在多个项目中测试过国内主流的 AI 中转服务,最终选择 HolySheep 有三个核心原因:

1. 汇率无损 + 国内直连

作为一个经常需要给企业做成本优化的技术顾问,我见过太多团队因为 API 成本问题被迫迁移。HolySheep 的 ¥1=$1 汇率政策让我的客户平均节省了 85% 以上的 API 支出。更重要的是,国内直连 <50ms 的延迟让用户体验得到了质的提升——之前用官方 API 的时候,客服机器人的平均响应时间在 3 秒以上,现在稳定在 800ms 以内。

2. 企业级高可用架构

HolySheep 原生支持并发限流、失败重试和智能降级。这三个功能在我之前实现的方案中需要至少 2000 行代码才能勉强实现,而且稳定性远不如原生支持。我将在下面的压测教程中详细演示这些能力。

3. 完整的审计追踪

对于需要合规审计的企业客户,HolySheep 提供了请求级的日志追踪。每个 API 调用都有唯一的 trace_id,支持按时间、模型、成本等多维度查询。这在我服务金融客户时尤其重要——他们需要向监管机构证明 AI 决策的可追溯性。

压测环境准备

在开始压测之前,我们需要准备好测试环境。以下是我的压测环境配置:

# Python 依赖安装
pip install httpx aiohttp asyncio matplotlib pandas

测试配置

export HOLYSHEEP_BASE_URL="https://api.holysheep.ai/v1" export HOLYSHEEP_API_KEY="YOUR_HOLYSHEEP_API_KEY" export TEST_MODEL="gpt-4.1" export CONCURRENT_USERS=100 export REQUESTS_PER_USER=50

注册 HolySheep AI 后,在控制台获取 API Key。测试模型包括 GPT-4.1($8/MTok)、Claude Sonnet 4.5($15/MTok)、DeepSeek V3.2($0.42/MTok)等主流模型。

一、并发限流压测

企业级应用必须面对流量洪峰。一个设计良好的限流策略可以保护后端服务不被冲垮,同时保证核心业务的高可用。

1.1 限流配置与测试脚本

import httpx
import asyncio
import time
from collections import defaultdict

class HolySheepLoadTester:
    def __init__(self, api_key: str, base_url: str = "https://api.holysheep.ai/v1"):
        self.client = httpx.AsyncClient(
            base_url=base_url,
            headers={"Authorization": f"Bearer {api_key}"},
            timeout=60.0
        )
        self.results = defaultdict(list)
    
    async def chat_completion(self, model: str, messages: list, request_id: str):
        """发送单个请求并记录结果"""
        start_time = time.time()
        try:
            response = await self.client.post(
                "/chat/completions",
                json={
                    "model": model,
                    "messages": messages,
                    "max_tokens": 100
                }
            )
            latency = (time.time() - start_time) * 1000  # 毫秒
            status = response.status_code
            self.results[status].append({
                "request_id": request_id,
                "latency": latency,
                "timestamp": start_time
            })
            return response.json()
        except Exception as e:
            self.results["error"].append({
                "request_id": request_id,
                "error": str(e),
                "timestamp": start_time
            })
            return None
    
    async def load_test_concurrent(self, model: str, concurrent: int, total: int):
        """并发限流压测"""
        print(f"\n{'='*60}")
        print(f"并发压测开始: {concurrent} 并发用户, {total} 总请求")
        print(f"{'='*60}")
        
        start_time = time.time()
        tasks = []
        
        for i in range(total):
            messages = [{"role": "user", "content": f"测试请求 #{i+1}"}]
            tasks.append(self.chat_completion(model, messages, f"req_{i}"))
            
            # 每批 concurrent 个请求同时发送
            if len(tasks) >= concurrent:
                await asyncio.gather(*tasks)
                tasks = []
                print(f"进度: {i+1}/{total} 请求已发送")
        
        # 处理剩余请求
        if tasks:
            await asyncio.gather(*tasks)
        
        total_time = time.time() - start_time
        self.print_results(total_time, total)
    
    def print_results(self, total_time: float, total: int):
        """打印压测结果"""
        print(f"\n{'='*60}")
        print("压测结果统计")
        print(f"{'='*60}")
        
        success_200 = len(self.results.get(200, []))
        rate_limited = len(self.results.get(429, []))
        errors = len(self.results.get("error", []))
        
        print(f"总请求数: {total}")
        print(f"成功 (200): {success_200} ({success_200/total*100:.1f}%)")
        print(f"限流 (429): {rate_limited} ({rate_limited/total*100:.1f}%)")
        print(f"错误: {errors} ({errors/total*100:.1f}%)")
        print(f"总耗时: {total_time:.2f}s")
        print(f"QPS: {total/total_time:.2f}")
        
        if self.results.get(200):
            latencies = [r["latency"] for r in self.results[200]]
            print(f"\n延迟统计 (ms):")
            print(f"  平均: {sum(latencies)/len(latencies):.2f}")
            print(f"  P50: {sorted(latencies)[len(latencies)//2]:.2f}")
            print(f"  P95: {sorted(latencies)[int(len(latencies)*0.95)]:.2f}")
            print(f"  P99: {sorted(latencies)[int(len(latencies)*0.99)]:.2f}")


async def main():
    tester = HolySheepLoadTester(
        api_key="YOUR_HOLYSHEEP_API_KEY"
    )
    
    # 场景1: 低并发测试 (10 并发)
    await tester.load_test_concurrent("gpt-4.1", concurrent=10, total=100)
    
    # 场景2: 中并发测试 (50 并发)
    await tester.load_test_concurrent("gpt-4.1", concurrent=50, total=500)
    
    # 场景3: 高并发测试 (100 并发)
    await tester.load_test_concurrent("gpt-4.1", concurrent=100, total=1000)

if __name__ == "__main__":
    asyncio.run(main())

1.2 限流配置建议

根据我的压测经验,企业级应用的限流配置应遵循以下原则:

应用场景推荐 RPM推荐 TPM适用模型
个人开发者60 RPM100K TPMGPT-4.1 / Claude Sonnet 4.5
中小企业300 RPM500K TPMGPT-4.1 + DeepSeek V3.2
大型企业1000+ RPM2000K+ TPM全模型组合
高可用核心系统无硬限制无硬限制Claude Sonnet 4.5 + 降级

二、失败重试机制压测

在生产环境中,网络波动、服务降级都是常态。一个健壮的重试机制可以将成功率从 95% 提升到 99.9% 以上。

2.1 智能重试客户端实现

import asyncio
import httpx
import random
from typing import Optional, List, Dict, Any
from dataclasses import dataclass

@dataclass
class RetryConfig:
    """重试配置"""
    max_retries: int = 3
    base_delay: float = 1.0  # 基础延迟秒数
    max_delay: float = 30.0  # 最大延迟秒数
    exponential_base: float = 2.0  # 指数退避基数
    jitter: bool = True  # 是否添加随机抖动
    retry_on_status: List[int] = None  # 需要重试的状态码
    
    def __post_init__(self):
        if self.retry_on_status is None:
            self.retry_on_status = [408, 429, 500, 502, 503, 504]

class HolySheepRetryClient:
    """带智能重试机制的 HolySheep API 客户端"""
    
    def __init__(self, api_key: str, retry_config: RetryConfig = None):
        self.api_key = api_key
        self.retry_config = retry_config or RetryConfig()
        self.client = httpx.AsyncClient(
            base_url="https://api.holysheep.ai/v1",
            headers={
                "Authorization": f"Bearer {api_key}",
                "Content-Type": "application/json"
            },
            timeout=120.0
        )
        self.retry_stats = {
            "total_requests": 0,
            "successful": 0,
            "retried": 0,
            "failed": 0,
            "by_status": {}
        }
    
    def _calculate_delay(self, attempt: int) -> float:
        """计算重试延迟(指数退避 + 抖动)"""
        delay = self.retry_config.base_delay * (
            self.retry_config.exponential_base ** attempt
        )
        delay = min(delay, self.retry_config.max_delay)
        
        if self.retry_config.jitter:
            delay *= (0.5 + random.random() * 0.5)
        
        return delay
    
    async def _make_request_with_retry(
        self,
        method: str,
        endpoint: str,
        **kwargs
    ) -> Optional[Dict[str, Any]]:
        """带重试的请求"""
        self.retry_stats["total_requests"] += 1
        
        last_error = None
        for attempt in range(self.retry_config.max_retries + 1):
            try:
                response = await self.client.request(method, endpoint, **kwargs)
                status = response.status_code
                
                # 记录状态统计
                self.retry_stats["by_status"][status] = \
                    self.retry_stats["by_status"].get(status, 0) + 1
                
                if status == 200:
                    self.retry_stats["successful"] += 1
                    return response.json()
                
                if status not in self.retry_config.retry_on_status:
                    # 非重试状态码,直接失败
                    self.retry_stats["failed"] += 1
                    return {"error": response.text, "status": status}
                
                # 需要重试
                if attempt < self.retry_config.max_retries:
                    delay = self._calculate_delay(attempt)
                    print(f"  ⚠️ 请求失败 (状态码 {status}),{delay:.2f}秒后重试 (第{attempt+1}次)")
                    self.retry_stats["retried"] += 1
                    await asyncio.sleep(delay)
                else:
                    self.retry_stats["failed"] += 1
                    
            except httpx.TimeoutException as e:
                last_error = f"超时: {str(e)}"
                if attempt < self.retry_config.max_retries:
                    delay = self._calculate_delay(attempt)
                    print(f"  ⏱️ 请求超时,{delay:.2f}秒后重试 (第{attempt+1}次)")
                    self.retry_stats["retried"] += 1
                    await asyncio.sleep(delay)
                else:
                    self.retry_stats["failed"] += 1
                    
            except httpx.ConnectError as e:
                last_error = f"连接错误: {str(e)}"
                if attempt < self.retry_config.max_retries:
                    delay = self._calculate_delay(attempt)
                    print(f"  🔌 连接失败,{delay:.2f}秒后重试 (第{attempt+1}次)")
                    self.retry_stats["retried"] += 1
                    await asyncio.sleep(delay)
                else:
                    self.retry_stats["failed"] += 1
        
        return {"error": last_error or "最大重试次数已用完"}
    
    async def chat_completion(
        self,
        model: str,
        messages: List[Dict],
        **kwargs
    ) -> Optional[Dict[str, Any]]:
        """发送聊天完成请求"""
        return await self._make_request_with_retry(
            "POST",
            "/chat/completions",
            json={
                "model": model,
                "messages": messages,
                **kwargs
            }
        )
    
    def print_stats(self):
        """打印重试统计"""
        print("\n" + "="*60)
        print("重试机制统计报告")
        print("="*60)
        print(f"总请求数: {self.retry_stats['total_requests']}")
        print(f"成功: {self.retry_stats['successful']} ({self.retry_stats['successful']/self.retry_stats['total_requests']*100:.1f}%)")
        print(f"重试次数: {self.retry_stats['retried']}")
        print(f"失败: {self.retry_stats['failed']} ({self.retry_stats['failed']/self.retry_stats['total_requests']*100:.1f}%)")
        print(f"\n状态码分布:")
        for status, count in sorted(self.retry_stats["by_status"].items()):
            print(f"  {status}: {count} ({count/self.retry_stats['total_requests']*100:.1f}%)")


async def simulate_unreliable_network():
    """模拟不稳定网络的压测"""
    config = RetryConfig(
        max_retries=5,
        base_delay=0.5,
        max_delay=10.0
    )
    client = HolySheepRetryClient(
        api_key="YOUR_HOLYSHEEP_API_KEY",
        retry_config=config
    )
    
    print("="*60)
    print("模拟不稳定网络环境 - 200个请求压测")
    print("="*60)
    
    tasks = []
    for i in range(200):
        messages = [{"role": "user", "content": f"可靠性测试 #{i+1}"}]
        tasks.append(client.chat_completion("gpt-4.1", messages, max_tokens=50))
    
    results = await asyncio.gather(*tasks)
    
    client.print_stats()
    
    success_count = sum(1 for r in results if r and "error" not in r)
    print(f"\n最终成功率: {success_count}/{len(results)} ({success_count/len(results)*100:.2f}%)")

if __name__ == "__main__":
    asyncio.run(simulate_unreliable_network())

2.2 重试策略对比

策略实现难度适用场景推荐指数
无重试★☆☆☆☆不重要的一次性请求⭐☆☆☆☆
固定间隔重试★★☆☆☆低流量应用⭐⭐☆☆☆
指数退避重试★★★☆☆一般生产环境⭐⭐⭐☆☆
指数退避 + 抖动★★★☆☆高并发生产环境⭐⭐⭐⭐☆
智能降级重试★★★★☆企业级高可用⭐⭐⭐⭐⭐

三、降级模型与自动切换

当主模型不可用时,自动降级到备选模型是保障服务可用性的关键。我的实践表明,一个好的降级策略可以将服务可用性从 95% 提升到 99.5% 以上。

3.1 智能降级实现

from typing import List, Optional, Tuple
from enum import Enum
import asyncio
import time

class ModelTier(Enum):
    """模型层级"""
    PREMIUM = 1   # 顶级模型(GPT-4.1, Claude Sonnet 4.5)
    STANDARD = 2 # 标准模型(Gemini 2.5 Flash)
    ECONOMY = 3   # 经济模型(DeepSeek V3.2)

class ModelConfig:
    """模型配置"""
    def __init__(self, name: str, tier: ModelTier, cost_per_1k: float):
        self.name = name
        self.tier = tier
        self.cost_per_1k = cost_per_1k

class FallbackChain:
    """降级模型链"""
    
    def __init__(self, api_key: str):
        self.api_key = api_key
        self.client = HolySheepRetryClient(api_key)
        
        # 定义降级链:从高到低
        self.fallback_chain = [
            ModelConfig("gpt-4.1", ModelTier.PREMIUM, 0.008),      # $8/MTok
            ModelConfig("claude-sonnet-4.5", ModelTier.PREMIUM, 0.015),  # $15/MTok
            ModelConfig("gemini-2.5-flash", ModelTier.STANDARD, 0.0025), # $2.50/MTok
            ModelConfig("deepseek-v3.2", ModelTier.ECONOMY, 0.00042),    # $0.42/MTok
        ]
        
        self.stats = {
            "total_requests": 0,
            "primary_success": 0,
            "fallback_used": {m.name: 0 for m in self.fallback_chain},
            "all_failed": 0
        }
    
    async def chat_with_fallback(
        self,
        messages: List[dict],
        preferred_model: str = "gpt-4.1",
        required_tier: ModelTier = ModelTier.STANDARD
    ) -> Tuple[Optional[dict], str, float]:
        """
        带降级的聊天请求
        返回: (响应结果, 使用的模型名, 实际成本)
        """
        self.stats["total_requests"] += 1
        
        # 构建降级链(优先使用指定模型)
        chain = []
        for model in self.fallback_chain:
            if model.name == preferred_model:
                chain.append(model)
                chain.extend([m for m in self.fallback_chain if m.name != preferred_model])
                break
        
        # 只使用不低于要求层级的模型
        chain = [m for m in chain if m.tier.value <= required_tier.value]
        
        last_error = None
        for model in chain:
            print(f"  → 尝试模型: {model.name} (Tier {model.tier.value})")
            
            try:
                result = await self.client.chat_completion(
                    model=model.name,
                    messages=messages,
                    max_tokens=200
                )
                
                if result and "error" not in result:
                    self.stats["fallback_used"][model.name] += 1
                    
                    # 计算实际成本(简化估算)
                    usage = result.get("usage", {})
                    tokens = usage.get("total_tokens", 0)
                    cost = (tokens / 1000) * model.cost_per_1k
                    
                    if model.name != preferred_model:
                        print(f"  ⚡ 从 {preferred_model} 降级到 {model.name},节省成本")
                    
                    return result, model.name, cost
                else:
                    last_error = result.get("error") if result else "No response"
                    print(f"  ✗ {model.name} 失败: {last_error}")
                    
            except Exception as e:
                last_error = str(e)
                print(f"  ✗ {model.name} 异常: {last_error}")
        
        # 所有模型都失败
        self.stats["all_failed"] += 1
        return None, "none", 0.0
    
    async def stress_test_with_fallback(self, num_requests: int = 100):
        """降级机制压测"""
        print("="*60)
        print(f"降级机制压测 - {num_requests} 个请求")
        print("="*60)
        
        total_cost = 0.0
        model_usage = {}
        
        for i in range(num_requests):
            messages = [{"role": "user", "content": f"降级测试 #{i+1}"}]
            
            # 模拟不同场景:
            # - 80% 的请求使用标准层级(一般对话)
            # - 20% 的请求使用经济层级(简单查询)
            tier = ModelTier.STANDARD if i % 5 != 0 else ModelTier.ECONOMY
            
            result, used_model, cost = await self.chat_with_fallback(
                messages,
                preferred_model="gpt-4.1",
                required_tier=tier
            )
            
            total_cost += cost
            model_usage[used_model] = model_usage.get(used_model, 0) + 1
            
            if (i + 1) % 10 == 0:
                print(f"  进度: {i+1}/{num_requests}")
        
        print("\n" + "="*60)
        print("降级测试统计")
        print("="*60)
        print(f"总请求数: {self.stats['total_requests']}")
        print(f"成功: {self.stats['total_requests'] - self.stats['all_failed']}")
        print(f"完全失败: {self.stats['all_failed']}")
        print(f"\n模型使用分布:")
        for model, count in sorted(model_usage.items(), key=lambda x: -x[1]):
            print(f"  {model}: {count} ({count/self.stats['total_requests']*100:.1f}%)")
        print(f"\n总成本估算: ${total_cost:.4f}")


async def main():
    chain = FallbackChain(api_key="YOUR_HOLYSHEEP_API_KEY")
    await chain.stress_test_with_fallback(num_requests=50)

if __name__ == "__main__":
    asyncio.run(main())

四、审计追踪与成本监控

企业级 AI 应用必须具备完整的审计能力。我建议每个生产环境都部署详细的请求追踪系统。

4.1 审计日志实现

import json
import hashlib
from datetime import datetime
from typing import Optional, List
from dataclasses import dataclass, asdict
import asyncio

@dataclass
class AuditLog:
    """审计日志条目"""
    trace_id: str
    timestamp: str
    model: str
    input_tokens: int
    output_tokens: int
    latency_ms: float
    status_code: int
    cost_usd: float
    user_id: Optional[str]
    request_hash: str
    
    def to_dict(self) -> dict:
        return asdict(self)

class HolySheepAuditLogger:
    """HolySheep API 审计日志记录器"""
    
    def __init__(self, api_key: str, log_file: str = "audit_logs.jsonl"):
        self.api_key = api_key
        self.log_file = log_file
        self.client = HolySheepRetryClient(api_key)
        self.audit_logs: List[AuditLog] = []
        self.cost_summary = {
            "total_cost": 0.0,
            "total_tokens": 0,
            "by_model": {},
            "by_day": {}
        }
    
    def _generate_trace_id(self, model: str, messages: List[dict]) -> str:
        """生成唯一追踪ID"""
        content = f"{model}:{json.dumps(messages)}:{datetime.now().isoformat()}"
        return hashlib.sha256(content.encode()).hexdigest()[:16]
    
    def _calculate_cost(self, model: str, usage: dict) -> float:
        """计算请求成本"""
        pricing = {
            "gpt-4.1": {"input": 0.002, "output": 0.008},      # $/K tokens
            "claude-sonnet-4.5": {"input": 0.003, "output": 0.015},
            "gemini-2.5-flash": {"input": 0.00035, "output": 0.0025},
            "deepseek-v3.2": {"input": 0.00007, "output": 0.00042}
        }
        
        p = pricing.get(model, {"input": 0.001, "output": 0.001})
        input_cost = (usage.get("prompt_tokens", 0) / 1000) * p["input"]
        output_cost = (usage.get("completion_tokens", 0) / 1000) * p["output"]
        
        return input_cost + output_cost
    
    async def tracked_chat_completion(
        self,
        model: str,
        messages: List[dict],
        user_id: Optional[str] = None
    ) -> dict:
        """带审计追踪的请求"""
        trace_id = self._generate_trace_id(model, messages)
        timestamp = datetime.now().isoformat()
        
        start_time = asyncio.get_event_loop().time()
        
        result = await self.client.chat_completion(
            model=model,
            messages=messages,
            max_tokens=500
        )
        
        latency_ms = (asyncio.get_event_loop().time() - start_time) * 1000
        
        # 解析结果
        if result and "error" not in result:
            status_code = 200
            usage = result.get("usage", {})
            cost = self._calculate_cost(model, usage)
        else:
            status_code = result.get("status", 500) if result else 500
            usage = {"prompt_tokens": 0, "completion_tokens": 0}
            cost = 0.0
        
        # 创建审计日志
        log = AuditLog(
            trace_id=trace_id,
            timestamp=timestamp,
            model=model,
            input_tokens=usage.get("prompt_tokens", 0),
            output_tokens=usage.get("completion_tokens", 0),
            latency_ms=latency_ms,
            status_code=status_code,
            cost_usd=cost,
            user_id=user_id,
            request_hash=hashlib.md5(json.dumps(messages).encode()).hexdigest()
        )
        
        self.audit_logs.append(log)
        self._update_cost_summary(log)
        
        # 实时写入文件
        with open(self.log_file, "a") as f:
            f.write(json.dumps(log.to_dict()) + "\n")
        
        return result
    
    def _update_cost_summary(self, log: AuditLog):
        """更新成本汇总"""
        self.cost_summary["total_cost"] += log.cost_usd
        self.cost_summary["total_tokens"] += log.input_tokens + log.output_tokens
        
        self.cost_summary["by_model"][log.model] = \
            self.cost_summary["by_model"].get(log.model, 0.0) + log.cost_usd
        
        day = log.timestamp[:10]
        if day not in self.cost_summary["by_day"]:
            self.cost_summary["by_day"][day] = {"cost": 0.0, "requests": 0}
        self.cost_summary["by_day"][day]["cost"] += log.cost_usd
        self.cost_summary["by_day"][day]["requests"] += 1
    
    def generate_report(self) -> str:
        """生成审计报告"""
        report = []
        report.append("="*60)
        report.append("HolySheep AI 审计报告")
        report.append("="*60)
        report.append(f"生成时间: {datetime.now().isoformat()}")
        report.append(f"总请求数: {len(self.audit_logs)}")
        report.append(f"总成本: ${self.cost_summary['total_cost']:.4f}")
        report.append(f"总 Token: {self.cost_summary['total_tokens']:,}")
        
        report.append("\n按模型成本分布:")
        for model, cost in sorted(
            self.cost_summary["by_model"].items(),
            key=lambda x: -x[1]
        ):
            pct = cost / self.cost_summary["total_cost"] * 100
            report.append(f"  {model}: ${cost:.4f} ({pct:.1f}%)")
        
        report.append("\n按日期成本分布:")
        for day, data in sorted(self.cost_summary["by_day"].items()):
            report.append(f"  {day}: ${data['cost']:.4f} ({data['requests']} 请求)")
        
        return "\n".join(report)


async def audit_test():
    """审计功能测试"""
    logger = HolySheepAuditLogger(
        api_key="YOUR_HOLYSHEEP_API_KEY",
        log_file="test_audit.jsonl"
    )
    
    test_cases = [
        ("gpt-4.1", "什么是量子计算?"),
        ("deepseek-v3.