Gemini 3.1 Pro Preview vs Nemotron 3.5 Lightning
For a typical chat reply (2,000 tokens in, 400 out), Gemini 3.1 Pro Preview costs 37× as much as Nemotron 3.5 Lightning: $8.80 against $0.24 per 1,000 requests at list price on 2026-09-28.
| Gemini 3.1 Pro Preview | Nemotron 3.5 Lightning | |
|---|---|---|
| Input, per 1M tokens | $2.00 | $0.08 |
| Output, per 1M tokens | $12.00 | $0.20 |
| Context window | 1.05M | 1M |
| Classification or routing (600 tokens in, 10 out), per 1,000 | $1.32 | $0.05 |
| Chat reply (2,000 in, 400 out), per 1,000 | $8.80 | $0.24 |
| Retrieval-augmented answer (8,000 in, 500 out), per 1,000 | $22.00 | $0.74 |
| Confidence signal | no | yes |
| Tool calling | yes | yes |
| BANKING77, correct of 400 | not measured | 255 |
Which one should carry your traffic?
If Nemotron 3.5 Lightning answers your requests as well as Gemini 3.1 Pro Preview, moving that traffic saves 97% on chat-shaped requests. Averages cannot tell you whether it does for your requests. Nemotron 3.5 Lightning exposes a confidence signal, so Gimbix can let it answer first and hand unsure cases to Gemini 3.1 Pro Preview.
Gemini 3.1 Pro Preview profile · Nemotron 3.5 Lightning profile · Measure it on your traffic