> ## 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. # OpenAI chat-latest Launches ยท Always Tracks ChatGPT's Default Instant Model > OpenAI introduces the version-less alias chat-latest, replacing the deprecated gpt-5.2-chat-latest / gpt-5.3-chat-latest, auto-tracking ChatGPT's current default Instant model (currently GPT-5.5 Instant). 400K context + 128K output + multimodal input. APIYI listed at $5/$30 per 1M tokens โ€” stackable recharge bonus brings effective cost to 79-86% of list. **2026/5/21 23:31 (UTC+8)** ยท New Model ยท OpenAI ๐Ÿš€ **OpenAI chat-latest launches ยท Always tracks ChatGPT's default Instant model** โ€” OpenAI introduces the version-less alias `chat-latest`, replacing the deprecated `gpt-5.2-chat-latest` / `gpt-5.3-chat-latest` (deprecation announced 5/8), **auto-tracking ChatGPT's current default Instant model** (currently GPT-5.5 Instant). 400K context + 128K output + multimodal input (text / image), \~50%+ fewer hallucinations vs the previous generation. ๐Ÿ’ฐ **List price matches OpenAI ยท Recharge promo brings effective cost to 79-86%** โ€” APIYI's official-proxy channel is listed at **\$5/\$30 per 1M tokens** (cached input \$0.50), identical to OpenAI's rates. Stacking the [recharge bonus promo](/en/faq/recharge-promotions) brings effective cost down to **79-86%** of list. **Default group + direct call works** โ€” existing Tokens drop in without config changes. ๐Ÿ“– Launch notes: [/en/news/chat-latest-launch](/en/news/chat-latest-launch) *** โ† [Back to Live Updates](/en/live) ยท ๐Ÿ“š [Monthly archive](/en/live/archive)