gemini api 가격
https://ai.google.dev/pricing 무료 기준 1.5 flash 15 RPM (requests per minute) 1 million TPM (tokens per minute) 1,500 RPD (requests per day) 1.5 pro 2 RPM (requests per minute) 32,000 TPM (tokens per minute) 50 RPD (requests per day) 1.0 pro 15 RPM (requests per minute) 32,000 TPM (tokens per minute) 1,500 RPD (requests per day)