Model comparison
Gemini 3.1 Pro Preview vs Mistral Medium 3.5
Compare Gemini 3.1 Pro Preview vs Mistral Medium 3.5 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Gemini 3.1 Pro Preview
gemini · gemini/gemini-3.1-pro-preview
- Input
- $2
- Output
- $12
- Context
- 1M
Mistral Medium 3.5
mistral · mistral/mistral-medium-3-5
- Input
- $1.5
- Output
- $7.5
- Context
- 262.1K
Quick take
Mistral Medium 3.5 has the lower input price at $1.5 per 1M input tokens. Mistral Medium 3.5 is cheaper for the example blended workload below. Gemini 3.1 Pro Preview has the larger context window at 1M tokens.
Choose Gemini 3.1 Pro Preview if...
- Gemini 3.1 Pro Preview is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- Gemini 3.1 Pro Preview is stronger when the same large prompt or document is reused because it supports prompt caching.
Choose Mistral Medium 3.5 if...
- Mistral Medium 3.5 is the better default for cost-sensitive traffic and repeated high-volume calls.
- Mistral Medium 3.5 gives more room for long generated answers, reports, or code output.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | Gemini 3.1 Pro Preview | Mistral Medium 3.5 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $4.40 | $3.00 | Mistral Medium 3.5 |
| 10M input + 2M output | $44.00 | $30.00 | Mistral Medium 3.5 |
| 100M input + 20M output | $440.00 | $300.00 | Mistral Medium 3.5 |
Context, output, and capability fit
Gemini 3.1 Pro Preview provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Gemini 3.1 Pro Preview max output
- 65.5K
- Mistral Medium 3.5 max output
- 262.1K
- Gemini 3.1 Pro Preview features
- prompt caching, function calling, vision
- Mistral Medium 3.5 features
- function calling, vision
Risk notes for Gemini 3.1 Pro Preview
- Preview or beta model: verify availability and pricing before production rollout.
Risk notes for Mistral Medium 3.5
- No prompt caching in this snapshot: repeated long-context calls may be more expensive.
Routing tags
frontierpreviewreasoninglong-contextmultimodalenterprise-ragragcodingagentsopen-weightenterpriselocal-open