Head to head
o3 vs Gemini 3.5 Flash
On a blended workload of one million input tokens and three million output tokens, o3 is 1.1× cheaper than Gemini 3.5 Flash.
| o3 | Gemini 3.5 Flash | |
|---|---|---|
| Provider | OpenAI | |
| Input / MTok | $2 | $1.5 |
| Output / MTok | $8 | $9 |
| Cache read / MTok | $0.5 | $0.15 |
| Context window | 200,000 | — |
| Blended 1M in + 3M out | $26.00 | $28.50 |
| Status | ga | ga |