Gemini 3.1 Pro vs Xiaomi MiMo-V2-Flash (OpenRouter): API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for Gemini 3.1 Pro (Google) and Xiaomi MiMo-V2-Flash (OpenRouter) (OpenRouter). Use the interactive calculator below to compute your exact monthly cost based on your token usage and request volume.
Prices verified Mar 10, 2026
Interactive Cost Calculator
Fills in typical token counts for a workload type
Tokens in each prompt sent to the model
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Showing costs for 2 models. Cheapest: Xiaomi MiMo-V2-Flash (OpenRouter) at $2.35/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestXiaomi MiMo-V2-Flash (OpenRouter) | OpenRouter | $2.35 | $0.000235 | $0.90 | $1.45 | 97.1% | Alerts coming soon |
Gemini 3.1 Pro | $80.00 | $0.008000 | $20.00 | $60.00 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | Gemini 3.1 Pro | Xiaomi MiMo-V2-Flash (OpenRouter) | Cheaper |
|---|---|---|---|
| Input (standard) | $2.00/M | $0.09/M | Xiaomi MiMo-V2-Flash (OpenRouter) |
| Output | $12.00/M | $0.29/M | Xiaomi MiMo-V2-Flash (OpenRouter) |
| Cached input | $0.20/M | N/A | — |
| Batch input | $1.00/M | N/A | — |
| Batch output | $6.00/M | N/A | — |
Prices last verified: 2026-03-08 – 2026-03-10
Cost Breakdown by Usage Volume
Estimated monthly costs at different request volumes, assuming 1,000 input tokens and 500 output tokens per request. Adjust in the calculator above for your specific use case.
| Volume | Gemini 3.1 ProMonthly | Xiaomi MiMo-V2-Flash (OpenRouter)Monthly | Gemini 3.1 ProPer request | Xiaomi MiMo-V2-Flash (OpenRouter)Per request |
|---|---|---|---|---|
| 1K requests/mo | $8.00 | $0.24 | $0.008000 | $0.000235 |
| 10K requests/mo | $80.00 | $2.35 | $0.008000 | $0.000235 |
| 100K requests/mo | $800.00 | $23.50 | $0.008000 | $0.000235 |
| 1M requests/mo | $8,000.00 | $235.00 | $0.008000 | $0.000235 |
Green values indicate the lower-cost option at each volume tier. Cost per request is calculated at 1,000 input + 500 output tokens using standard (non-batch, non-cached) pricing.
Price History
Input price per 1M tokensWhen to Choose Gemini 3.1 Pro
by Google
- Document summarization
- RAG / Semantic search
- Code generation
Input / 1M tokens
$2.00/M
Output / 1M tokens
$12.00/M
Context window
2,097,152
Tier
premium
When to Choose Xiaomi MiMo-V2-Flash (OpenRouter)
by OpenRouter
- Text classification
- General chatbot
- Customer support
Input / 1M tokens
$0.09/M
Output / 1M tokens
$0.29/M
Context window
262,144
Tier
budget
Key Differences Beyond Price
Cost is only one factor in choosing an AI model. Context window size, rate limits, supported features, and latency all affect whether a model fits your use case.
| Capability | Gemini 3.1 Pro | Xiaomi MiMo-V2-Flash (OpenRouter) |
|---|---|---|
| Context window | 2,097,152 tokens | 262,144 tokens |
| Max output tokens | 65,536 tokens | 65,536 tokens |
| Performance tier | Premium | Budget |
| Vision / image input | Yes | No |
| Function calling | Yes | Yes |
| JSON mode | Yes | Yes |
| Prompt caching | Yes | No |
| Batch API (50% discount) | Yes | No |
| Extended reasoning | Yes | No |
| Fine-tuning | No | No |
| Rate limit (req/min) | 1,000 | Not published |
Gemini 3.1 Pro notes
Preview model. Tiered pricing: prompts over 200K tokens billed at $4.00 input / $18.00 output.
Xiaomi MiMo-V2-Flash (OpenRouter) notes
OpenRouter offers 200+ models — showing top 15 unique models not available from other listed providers. Prices include OpenRouter markup.
Frequently Asked Questions
Is Gemini 3.1 Pro cheaper than Xiaomi MiMo-V2-Flash (OpenRouter)?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), Xiaomi MiMo-V2-Flash (OpenRouter) costs $23.50/month versus $800.00/month for Gemini 3.1 Pro — a 97% saving. Your actual savings will vary based on your token profile; output-heavy workloads amplify differences in output pricing.
Which model has a larger context window, Gemini 3.1 Pro or Xiaomi MiMo-V2-Flash (OpenRouter)?
Gemini 3.1 Pro has a larger context window at 2,097,152 tokens, compared to 262,144 tokens for Xiaomi MiMo-V2-Flash (OpenRouter). A larger context window is important for processing long documents, multi-turn conversations, or large codebases without truncation.
Do Gemini 3.1 Pro and Xiaomi MiMo-V2-Flash (OpenRouter) support the Batch API?
Gemini 3.1 Pro supports the Batch API (50% discount for async processing), while Xiaomi MiMo-V2-Flash (OpenRouter) does not. If your workload tolerates up to 24-hour latency, routing to Gemini 3.1 Pro with batch pricing could significantly cut costs versus Xiaomi MiMo-V2-Flash (OpenRouter)'s standard rate.
Which model offers better prompt caching?
Gemini 3.1 Pro supports prompt caching at $0.20/M for cached input, while Xiaomi MiMo-V2-Flash (OpenRouter) does not offer prompt caching. For RAG applications or chatbots with large, repeated context, Gemini 3.1 Pro's caching capability can substantially reduce effective costs.
What are the best use cases for Gemini 3.1 Pro vs Xiaomi MiMo-V2-Flash (OpenRouter)?
Gemini 3.1 Pro is best suited for Document summarization, RAG / Semantic search, Code generation, while Xiaomi MiMo-V2-Flash (OpenRouter) is optimized for Text classification, General chatbot, Customer support. Choose based on which use case matches your primary workload — and validate with the cost calculator above to confirm the total monthly spend fits your budget.
What is the cost per request for Gemini 3.1 Pro vs Xiaomi MiMo-V2-Flash (OpenRouter)?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — Gemini 3.1 Pro costs $0.008000 per request and Xiaomi MiMo-V2-Flash (OpenRouter) costs $0.000235 per request. At 100,000 requests/month, that translates to $800.00 and $23.50 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
Gemini 3.1 Pro vs Xiaomi MiMo-V2-Flash (OpenRouter): Summary
When comparing Gemini 3.1 Pro and Xiaomi MiMo-V2-Flash (OpenRouter) for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. Xiaomi MiMo-V2-Flash (OpenRouter) offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $23.50/month, compared to $800.00/month for Gemini 3.1 Pro.
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. Gemini 3.1 Pro charges $2.00/M for input tokens and $12.00/M for output tokens. Xiaomi MiMo-V2-Flash (OpenRouter) charges $0.09/M input and $0.29/M output. If your workload is output-heavy (more tokens generated than consumed as input), the model with the lower output price compounds cost savings significantly at scale.
Prompt caching is supported by Gemini 3.1 Pro but not Xiaomi MiMo-V2-Flash (OpenRouter). For workloads with large, repeated system prompts or document context — such as RAG pipelines or multi-turn conversations with a fixed knowledge base — prompt caching can reduce effective input costs by 60–90%, which may change the cost ranking between these two models at your specific usage pattern.
Context window capacity differs between the two: Gemini 3.1 Pro supports up to 2,097,152 tokens in a single request, versus 262,144 tokens for Xiaomi MiMo-V2-Flash (OpenRouter). A larger context window is essential for document summarization, large codebase analysis, and multi-document retrieval-augmented generation (RAG) applications.
Use the interactive calculator at the top of this page to enter your actual token usage and monthly request volume for a precise cost comparison tailored to your workload. Adjust for batch API discounts and prompt caching to find the most cost-effective option for your specific deployment.
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Relevant Use Cases
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