Gemini 3.1 Pro Preview vs Mistral Medium 3.5
API pricing, context, and independently measured performance, side by side. Gemini 3.1 Pro Preview starts 33% cheaper on input than Mistral Medium 3.5 at list prices.
Gemini 3.1 Pro Preview
Google · released Feb 19, 2026
Best input$1.00 / MTok
Best output$6.00 / MTok
Context1.05M
Providers6
Fastest measured2.6s° TTFT · 285 tok/s
VisionToolsReasoningStructured outputPrompt caching
Mistral Medium 3.5
Mistral · released Apr 30, 2026
Best input$1.50 / MTok
Best output$7.50 / MTok
Context262K
Providers1
Fastest measured4.3s° TTFT · 151 tok/s
VisionToolsReasoningStructured output
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| Gemini 3.1 Pro Preview |  Google AI Studio | $1.00 | $6.00 | 3.3s° | 671° tok/s | — |
| Gemini 3.1 Pro Preview |  Google | $1.00 | $6.00 | 2.6s° | 285° tok/s | — |
| Mistral Medium 3.5 |  Mistral | $1.50 | $7.50 | 4.3s° | 151° tok/s | — |
TTFT/TPS: ModelIndex-measured medians (P50, trailing 72h) · chat10k profile (~10K in / 200 out) · ° = measured via OpenRouter routing (adds a hop) · SMOKE: of 5 programmatic capability probes passed · methodology v1.1 — full details on each model page