GPT-5.1 vs Gemini 3 Pro

OpenAI · Google — Interactive pricing comparison

Input tokens per request4K

Output tokens per request2K

Requests per day100

OpenAI

Input$1.25/1M

Output$10/1M

Cache read$0.13/1M

Cost per request$0.025

Monthly estimate$75.00

Max input272K

Max output128K

Google

Input$2/1M

Output$12/1M

Cache read$0.2/1M

Cost per request$0.032

Monthly estimate$96.00

Max input1.0M

Max output66K

GPT-5.1 is 22% cheaper at this usage

Gemini 3 Pro has a larger context window

Capabilities