Head-to-Head API Cost Benchmark

Gemini 2.5 Flash vs GPT-4o mini: API Price & Latency Comparison

On a standard B2B production workload (5,000 req/day), Gemini 2.5 Flash is 9.0% cheaper ($71.16/mo vs $78.19/mo), while Gemini 2.5 Flash leads in token generation speed (180 tok/s).

Side-by-Side Specification & Billing Matrix

Metric Gemini 2.5 Flash (Google Gemini API) GPT-4o mini (OpenAI) Advantage
Standard Input / 1M Tokens $0.150 $0.150 Gemini 2.5 Flash
Cached Input / 1M Tokens $0.037 $0.075 Gemini 2.5 Flash
Output Generation / 1M Tokens $0.60 $0.60 Gemini 2.5 Flash
Intelligence / Benchmark Quality 1264 LMSYS Elo 1224 LMSYS Elo Gemini 2.5 Flash
Monthly Spend (5k req/day, 50% cache) $71.16 / mo $78.19 / mo Gemini 2.5 Flash (-9.0%)
Context Window 1,000,000 tokens 128,000 tokens Gemini 2.5 Flash
Output Speed (Throughput) 180 tokens/sec 140 tokens/sec Gemini 2.5 Flash
Batch API Discount -50% (Google Gemini API) -50% (OpenAI) Google Gemini API
Primary Workload Fit Large-scale data extraction, PDF/document parsing, high-throughput pipelines High-volume classification, extraction, RAG summarization, low-cost chatbots Workload Dependent
Deploy / Console Access Try Gemini 2.5 Flash → Try GPT-4o mini → Open Full Simulator