Home / Compare / Gemma 4 31B vs GPT-5.5

Gemma 4 31B vs GPT-5.5

For a typical chat reply (2,000 tokens in, 400 out), GPT-5.5 costs 70× as much as Gemma 4 31B: $22.00 against $0.316 per 1,000 requests at list price on 2026-09-28.

Gemma 4 31BGPT-5.5
Input, per 1M tokens$0.09$5.00
Output, per 1M tokens$0.34$30.00
Context window262K1.05M
Classification or routing (600 tokens in, 10 out), per 1,000$0.0574$3.30
Chat reply (2,000 in, 400 out), per 1,000$0.316$22.00
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$0.89$55.00
Confidence signalyesno
Tool callingyesyes
BANKING77, correct of 400304not measured

Which one should carry your traffic?

If Gemma 4 31B answers your requests as well as GPT-5.5, moving that traffic saves 99% on chat-shaped requests. Averages cannot tell you whether it does for your requests. Gemma 4 31B exposes a confidence signal, so Gimbix can let it answer first and hand unsure cases to GPT-5.5.

Gemma 4 31B profile · GPT-5.5 profile · Measure it on your traffic