GPT-4o vs Gemini 1.5 Pro API Cost & Architecture Guide
Selecting between GPT-4o (OpenAI) and Gemini 1.5 Pro (Google) for production Code Generation & Review workloads requires balancing token pricing, prompt caching discounts, context window capacity (128K vs 2M), and streaming throughput (110 vs 75 tok/s).
GPT-4o is priced at $2.50 per 1M input tokens ($1.250/1M with prompt caching) and $10.00 per 1M output tokens. By comparison, Gemini 1.5 Pro charges $1.25 per 1M input tokens ($0.310/1M cached) and $5.00 per 1M output tokens.
At 2,500 requests/day (375.0M monthly input tokens and 112.5M monthly output tokens with a 55% cache hit rate), GPT-4o costs $1804.69/month whereas Gemini 1.5 Pro costs $837.38/monthโa monthly variance of $967.31 ($11608/year).
Frequently Asked Questions
Is GPT-4o or Gemini 1.5 Pro cheaper for Code Generation & Review?
Under standard Code Generation & Review parameters (2,500 reqs/day, 5000 input tokens, 1500 output tokens, 55% cache hit), Gemini 1.5 Pro is more cost-effective, saving $967.31 per month ($11607.75 annually).
How does prompt caching affect GPT-4o vs Gemini 1.5 Pro pricing?
GPT-4o reduces cached input costs to $1.25/1M tokens, while Gemini 1.5 Pro charges $0.31/1M cached input tokens. High system-prompt reuse in Code Generation & Review pipelines can cut total input token spend by 50%โ90%.
What are the context window and speed differences between GPT-4o and Gemini 1.5 Pro?
GPT-4o supports a 128K token context window at ~110 tokens/sec, while Gemini 1.5 Pro provides a 2M token context window at ~75 tokens/sec.