Google Gemini API pricing

Google splits Gemini into a Flash line and a Pro line, and the spread between them is narrower than most. Gemini 3.5 Flash costs $1.50 per million input tokens and $9 output; Flash Lite drops to $0.30 and $2.50; Gemini 3.1 Pro Preview sits at $2 and $12, a third above Flash on both meters. Cached input is a tenth of the input rate on all three, though Google bills cache storage separately per token-hour rather than as a cache-write rate. The distinctive rule is Pro's second table above 200K tokens — $4 input, $0.40 cached, $18 output — so long-context work is priced from a different sheet.