Gemini Flash (latest) vs GPT-6 Luna: cost
For a typical support chatbot, GPT-6 Luna is about 7.5× cheaper than Gemini Flash (latest) ($6.97 vs $52.31 per month). Price is only one factor: test both on your own prompts before switching.
| Gemini Flash (latest) | GPT-6 Luna | |
|---|---|---|
| Input /1M | $0.75 | $0.10 |
| Output /1M | $3.75 | $0.50 |
| Cached input /1M | $0.075 | $0.01 |
| Batch input /1M | $0.375 | $0.05 |
| Batch output /1M | $1.875 | $0.25 |
| Context | 1,048,576 | 922,000 |
Monthly cost by workload
| Scenario (per month) | Gemini Flash (latest) | GPT-6 Luna |
|---|---|---|
| Customer support chatbot 1,000 req/day · 1,500 in · 300 out | $52.31 | $6.97 |
| RAG over documents 500 req/day · 6,000 in · 400 out | $71.77 | $9.57 |
| Agent loop (10 calls/task, 200 tasks) 2,000 req/day · 8,000 in · 500 out | $246 | $32.76 |
| Batch summarization 10,000 req/day · 3,000 in · 200 out · batch | $450 | $60.00 |