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GPT-5.4 Mini vs GLM 5.3

For a typical chat reply (2,000 tokens in, 400 out), GPT-5.4 Mini costs 1.4× as much as GLM 5.3: $3.30 against $2.41 per 1,000 requests at list price on 2026-09-28.

GPT-5.4 MiniGLM 5.3
Input, per 1M tokens$0.75$0.325
Output, per 1M tokens$4.50$4.40
Context window400K1.31M
Classification or routing (600 tokens in, 10 out), per 1,000$0.495$0.239
Chat reply (2,000 in, 400 out), per 1,000$3.30$2.41
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$8.25$4.80
Confidence signalnoyes
Tool callingyesyes

Which one should carry your traffic?

If GLM 5.3 answers your requests as well as GPT-5.4 Mini, moving that traffic saves 27% on chat-shaped requests. Averages cannot tell you whether it does for your requests. GLM 5.3 exposes a confidence signal, so Gimbix can let it answer first and hand unsure cases to GPT-5.4 Mini.

GPT-5.4 Mini profile · GLM 5.3 profile · Measure it on your traffic