Head-to-Head API Cost Benchmark

DeepSeek-R1 (Reasoner) vs Gemini 2.5 Flash: API Price & Latency Comparison

On a standard B2B production workload (5,000 req/day), Gemini 2.5 Flash is 72.7% cheaper ($71.16/mo vs $260.77/mo), while Gemini 2.5 Flash leads in token generation speed (180 tok/s).

Side-by-Side Specification & Billing Matrix

Metric DeepSeek-R1 (Reasoner) (DeepSeek API) Gemini 2.5 Flash (Google Gemini API) Advantage
Standard Input / 1M Tokens $0.550 $0.150 Gemini 2.5 Flash
Cached Input / 1M Tokens $0.140 $0.037 Gemini 2.5 Flash
Output Generation / 1M Tokens $2.19 $0.60 Gemini 2.5 Flash
Intelligence / Benchmark Quality 1315 LMSYS Elo 1264 LMSYS Elo DeepSeek-R1 (Reasoner)
Monthly Spend (5k req/day, 50% cache) $260.77 / mo $71.16 / mo Gemini 2.5 Flash (-72.7%)
Context Window 64,000 tokens 1,000,000 tokens Gemini 2.5 Flash
Output Speed (Throughput) 50 tokens/sec 180 tokens/sec Gemini 2.5 Flash
Batch API Discount -50% (DeepSeek API) -50% (Google Gemini API) DeepSeek API
Primary Workload Fit Budget-friendly chain-of-thought logic, financial verification, logic synthesis Large-scale data extraction, PDF/document parsing, high-throughput pipelines Workload Dependent
Deploy / Console Access Try DeepSeek-R1 (Reasoner) → Try Gemini 2.5 Flash → Open Full Simulator