Head-to-Head API Cost Benchmark

Gemini 2.5 Pro vs OpenAI o3-mini: API Price & Latency Comparison

On a standard B2B production workload (5,000 req/day), OpenAI o3-mini is 35.8% cheaper ($573.38/mo vs $892.50/mo), while OpenAI o3-mini leads in token generation speed (95 tok/s).

Side-by-Side Specification & Billing Matrix

Metric Gemini 2.5 Pro (Google Gemini API) OpenAI o3-mini (OpenAI) Advantage
Standard Input / 1M Tokens $1.250 $1.100 OpenAI o3-mini
Cached Input / 1M Tokens $0.310 $0.550 Gemini 2.5 Pro
Output Generation / 1M Tokens $10.00 $4.40 OpenAI o3-mini
Intelligence / Benchmark Quality 1322 LMSYS Elo 1305 LMSYS Elo Gemini 2.5 Pro
Monthly Spend (5k req/day, 50% cache) $892.50 / mo $573.38 / mo OpenAI o3-mini (-35.8%)
Context Window 2,000,000 tokens 200,000 tokens Gemini 2.5 Pro
Output Speed (Throughput) 85 tokens/sec 95 tokens/sec OpenAI o3-mini
Batch API Discount -50% (Google Gemini API) -50% (OpenAI) Google Gemini API
Primary Workload Fit Massive repository analysis (2M context), video/audio understanding, deep reasoning Algorithmic code generation, math, STEM reasoning, automated QA agents Workload Dependent
Deploy / Console Access Try Gemini 2.5 Pro → Try OpenAI o3-mini → Open Full Simulator