> ## Documentation Index > Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt > Use this file to discover all available pages before exploring further. # New Groups Page and Official-Relay vs Reverse-Engineered API FAQ > APIYI added a Groups page and an official-relay vs reverse-engineered API FAQ, covering multipliers, discounts, model coverage, and selection guidance for 14 groups. **2026/11/14 23:38 (UTC+8)** ยท Docs Update ยท Anthropic / OpenAI / Google ๐Ÿ“– **New Groups page and an official-relay vs reverse-engineered API FAQ** * [Groups](https://docs.apiyi.com/en/groups.md): official-relay by default, with multipliers, default discounts, effective discounts after recharge bonuses, model coverage, selection guidance by vendor and key model including image generation, and the token-creation steps for selecting a group. It also covers the positioning of `NB-Enterprise` (`Default` ร— 1.4, still about 50% of official) and `SeeDance2` (supply, face whitelisting, and the free asset library), and clarifies that APIYI has no separate business-negotiation policy: pricing is transparent and recharge bonuses are the only discount. * [What Is the Difference Between Official-Relay and Reverse-Engineered APIs?](https://docs.apiyi.com/en/faq/official-vs-reverse-api.md): a dimension-by-dimension comparison of stability, protocol compatibility, caching, concurrency, and compliance, plus five channel acceptance metrics. The update also clarifies that APIYI currently has three text/coding reverse groups: `Claude_Reverse`, `Codex_Reverse`, and `Gemini_Reverse`. `Default` / `SVIP` are mostly official relay but include reverse image models such as `-all` / `-vip`. Production workloads, enterprise customers, and complex Agent workflows should prefer official relay. *** โ† [Back to Live Updates](https://docs.apiyi.com/en/live.md) ยท ๐Ÿ“š [Monthly archive](https://docs.apiyi.com/en/live/archive.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.