Home / Compare / Gemini 3.5 Flash Lite vs GPT-4.1 Mini

Gemini 3.5 Flash Lite vs GPT-4.1 Mini

For a typical chat reply (2,000 tokens in, 400 out), Gemini 3.5 Flash Lite costs 1.1× as much as GPT-4.1 Mini: $1.60 against $1.44 per 1,000 requests at list price on 2026-09-28.

Gemini 3.5 Flash LiteGPT-4.1 Mini
Input, per 1M tokens$0.30$0.40
Output, per 1M tokens$2.50$1.60
Context window1.05M1.05M
Classification or routing (600 tokens in, 10 out), per 1,000$0.205$0.256
Chat reply (2,000 in, 400 out), per 1,000$1.60$1.44
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$3.65$4.00
Confidence signalnono
Tool callingyesyes
BANKING77, correct of 400305not measured

Which one should carry your traffic?

If GPT-4.1 Mini answers your requests as well as Gemini 3.5 Flash Lite, moving that traffic saves 10% 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.

Gemini 3.5 Flash Lite profile · GPT-4.1 Mini profile · Measure it on your traffic