Side-by-side technical and economic comparison between Google's Gemini 3.1 Pro Preview and Mistral AI's Mistral Small 4.
| Metric | Gemini 3.1 Pro Preview | Mistral Small 4 | Advantage |
|---|---|---|---|
| Provider Organization | Mistral AI | — | |
| Standard Input / 1M | $2.00 | $0.15 | Mistral Small 4 (93% lower) |
| Cached Input / 1M | $0.20 | $0.015 | Mistral Small 4 lower |
| Output / 1M | $12.00 | $0.60 | Mistral Small 4 lower |
| Context Window | 1.05M | 256k | Gemini 3.1 Pro Preview (1.05M) |
| Max Generation Tokens | 16.4k | 8.2k | Gemini 3.1 Pro Preview |
| Tokenizer Family | Google Gemini SentencePiece (256k vocabulary) | Mistral Tekken Tokenizer (131k vocabulary) | — |
Opt for Gemini 3.1 Pro Preview when your engineering requirements prioritize Google's ecosystem, specific tokenizer efficiencies (Calibrated Gemini Tokenizer (±4%)), or when your expected prompt-to-completion ratios favor its $2/M input rate.
Opt for Mistral Small 4 when looking for Mistral AI's tooling integration, specific context window depth (256k tokens), or when output generation volume favors its $0.6/M rate.