Google: Gemini 2.5 Pro vs OpenAI: GPT-5
On input price, Google: Gemini 2.5 Pro is ~1.0× cheaper. Verified 2026-08-23.
| Metric | Google: Gemini 2.5 Pro | OpenAI: GPT-5 |
|---|---|---|
| Input / 1M | $1.25 | $1.25 |
| Output / 1M | $10.00 | $10.00 |
| Cache read / 1M | $0.125 | $0.125 |
| Context window | 1.0M | 400K |
| Max output | 66K | 128K |
Monthly cost by workload
| Workload | Google: Gemini 2.5 Pro | OpenAI: GPT-5 | Cheaper |
|---|---|---|---|
| Chatbot | $50.00 | $50.00 | Google: Gemini 2.5 Pro |
| Coding agent | $150.00 | $150.00 | Google: Gemini 2.5 Pro |
| RAG pipeline | $300.00 | $300.00 | Google: Gemini 2.5 Pro |
Full details: Google: Gemini 2.5 Pro pricing · OpenAI: GPT-5 pricing