Comparison · prices as of 2026-07-04

GPT-5.1 vs GPT-5 mini

On price alone, GPT-5 mini (OpenAI) runs about 80% cheaper than GPT-5.1 for a typical chat workload (2K input + 500 output tokens, 1,000 requests/day). Whether that's the right trade depends on the capability gap — pricing below, verify quality on your own evals.

Spec GPT-5.1 GPT-5 mini
Input / MTok $1.25 $0.25
Output / MTok $10 $2
Context window 400K 400K
Max output 128K 128K
Class frontier workhorse
Reference workload / month $225.00 $45.00

Sources: OpenAI pricing · OpenAI pricing. Run your own numbers in the cost calculator.