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This article introduces a self-built AI API aggregation gateway that solves the instability and frequent failures of relay APIs by locking price ranges, multi-vendor bidding, and millisecond disaster recovery routing. 
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大家好，最近在推进 AI 业务落地的过程中，被市面上的各种大模型中转 API 折磨得不轻。
痛点大家应该都深有体会：
价格刺客：渠道商看心情涨价，同样是 Claude 3.5 或者 GPT-4o ，不同渠道价格天差地别，今天便宜明天贵，业务成本根本没法做预算。
极度不稳定： 鸡蛋放在一个篮子里，一到晚上高峰期各种 429 、502 满天飞，切接口全靠手动改代码，不仅心累还影响业务。
市面上的中转站多如牛毛，但真正好用的“路由分发”系统却很少。为了解决业务痛点，我顺手搓了一个带智能路由的 AI API 聚合网关，跑了一段时间非常稳，现在开放给大家使用：a6api.com
它不是一个简单的“二道贩子”渠道，而是一个“全网商家聚合与竞价优选”平台。
核心亮点分享：
- 杀手锏：支持自定义“理想价格区间” 这是我自己做这个平台最核心的诉求。在 a6api 后台，你可以针对某个模型强制设定一个你能接受的价格区间（最高价和最低价）。 系统在转发你的请求时，绝对不会去调用超过你预算的商家通道。只要你锁死了成本上限，就永远不会遇到“一觉醒来账单爆炸”的惨剧，主打一个成本绝对可控。
- 引入多商家竞价，透明比价 我们接入了市面上绝大多数有实力的 API 供应商。在这个平台里，同款大模型有无数商家在同台竞技。你能直观地看到各条通道的实时报价和延迟数据。就像买机票一样，买方市场，哪家便宜稳妥就走哪家，彻底打破信息差。
- 智能动态路由，容灾拉满 你只需要配置一个 a6api 的 Key 和 Base URL 。底层网关会根据“可用率 + 响应延迟 (TTFT) + 你的自定义价格限制”，实时、动态地为你匹配当前最优的通道。 如果命中故障节点（ 502/超时），网关层会实现毫秒级无感切换，业务端连报错都看不到，实现平滑容灾。
Key Quotes
> Price gouging: channel providers raise prices at will. For the same Claude 3.5 or GPT-4o, prices vary wildly across channels—cheap today, expensive tomorrow. Business costs are simply impossible to budget.
> As long as you lock in a cost ceiling, you will never encounter the tragedy of 'waking up to an exploded bill.' The focus is on absolute cost control.
> If a faulty node is hit (502/timeout), the gateway layer performs millisecond-level seamless switching, and the business side doesn't even see an error, achieving smooth disaster recovery.
Tags
AI API
API Gateway
AI Applications
Cost Control
Disaster Recovery
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