Do they charge below their cost? Or do they run their own cache?
Vercel cache read: $0.01/M for flash, $0.14/M for pro.
Deepseek and OpenRouter cache read: $0.028/M for flash, $0.145 for pro.
That's a 64% discount on Vercel for flash, and a 3% discount for pro.
Links: Vercel - https://vercel.com/ai-gateway/models OpenRouter - https://openrouter.ai/deepseek/deepseek-v4-flash