Vercel AI Gateway — Google Gemini 3.8 Flash (Google/Vertex route) — Event History

First canonical observation. Vercel AI Gateway advertises 50% off Google Gemini 3.8 Flash on Google and Vertex routes: $0.75/1M input tokens, $3.75/1M output tokens, $0.08/1M cache read; 1M context. Promotional end date not published.