Verdict
Built from the measurements below
- Accuracy is too close to call: Gemma 4 31B scored 30.0% and Trinity Large Thinking 28.8% on the same 80 questions, a gap within what chance alone could produce.
- Gemma 4 31B is 1.8× cheaper per question as billed ($0.0014 vs $0.0025), reasoning tokens included.
- Trinity Large Thinking generates text 5.6× faster: 329 tokens per second against 58.
- Trinity Large Thinking starts answering sooner: 0.6 s to the first token, against 0.6 s for Gemma 4 31B.
Which should you choose?
Choose Gemma 4 31B for the lower cost per correct answer ($0.0046 against $0.0087), open weights you can run yourself and more hosts to choose from on OpenRouter (13 against 1). Choose Trinity Large Thinking for faster streaming and a quicker first token.
Accuracy gap +1.3 points (z = 0.17). We call a winner only when z is at least 1.96, the usual 95% threshold. Speed, latency and price need a 10% margin.