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GPT-4.1 Mini vs GPT-5.4

For a typical chat reply (2,000 tokens in, 400 out), GPT-5.4 costs 7.6× as much as GPT-4.1 Mini: $11.00 against $1.44 per 1,000 requests at list price on 2026-09-28.

GPT-4.1 MiniGPT-5.4
Input, per 1M tokens$0.40$2.50
Output, per 1M tokens$1.60$15.00
Context window1.05M1.05M
Classification or routing (600 tokens in, 10 out), per 1,000$0.256$1.65
Chat reply (2,000 in, 400 out), per 1,000$1.44$11.00
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$4.00$27.50
Confidence signalnono
Tool callingyesyes

Which one should carry your traffic?

If GPT-4.1 Mini answers your requests as well as GPT-5.4, moving that traffic saves 87% on chat-shaped requests. Averages cannot tell you whether it does for your requests. GPT-4.1 Mini does not expose a confidence signal through OpenRouter, so Gimbix would test it as a full replacement rather than a first answer.

GPT-4.1 Mini profile · GPT-5.4 profile · Measure it on your traffic