How much cheaper is GPT-4o mini?

GPT-4o mini is dramatically cheaper than GPT-4o — roughly 15× lower on input tokens and 15-17× lower on output tokens at list prices. Routing even a portion of simple tasks to it can cut a bill substantially.

Will quality drop if I route to mini?

It can on hard tasks. The success-rate delta input lets you model the quality cost. The strategy works best when you route only easy, well-defined tasks to mini and keep complex reasoning on GPT-4o.

How is the blended cost computed?

The tool prices the mini share at GPT-4o mini rates and the remaining share at GPT-4o rates, sums them, and compares the blended total to running everything on GPT-4o.

Is anything uploaded?

No. The calculation runs entirely in your browser. Nothing you enter is stored or transmitted.

GPT-4o mini vs GPT-4o Savings Calculator

GPT-4o mini vs GPT-4o savings calculator

GPT-4o mini is roughly 15× cheaper than GPT-4o, so routing your simple, well-defined tasks to it while keeping hard reasoning on GPT-4o can slash a bill without hurting quality where it matters. This tool models that split: pick what fraction goes to mini and see the blended cost, the monthly savings, and the success-rate tradeoff side by side.

How it works

You give a single token profile and a split. The calculator prices each share at its own model’s rate and blends them:

mini_share  = total × fraction
full_share  = total × (1 − fraction)
blended = mini_share × mini_per_req + full_share × gpt4o_per_req
saving  = all_gpt4o_cost − blended

The success-rate delta you enter is informational — it lets you weigh the dollars saved against any drop in task quality, since the cheapest blend is not worth it if mini fails the tasks you sent it.

Tips

Route by task type, not randomly — classification, extraction and short rewrites are great for mini; multi-step reasoning should stay on GPT-4o.
Add a fallback: if mini’s answer fails a validation check, retry on GPT-4o. The retry cost is small if mini handles most cases.
Watch the success-rate delta — a 2-3 point drop on easy tasks is usually fine; a large drop means you are routing the wrong work to mini.
Re-measure after prompt changes; a better prompt can let mini handle more.