Model decision surface
Compare AI models
Start with Gemini 3.1 Pro Preview and Gemma 4 31B, or choose any two current ranked language models. Compare capability evidence, price, context, provider availability, and weight access without pretending one field decides every use case.
Current public data
Gemini 3.1 Pro Preview vs Gemma 4 31B
Live dataset updated 11/7/2026, 2:00:08 PM UTC
Open 1200×630 evidence receipt| Field | Gemini 3.1 Pro Preview | Gemma 4 31B |
|---|---|---|
| ModelCap position | #14 | #37 |
| Index score | 80.6 | 72.2 |
| Evidence | Measured3 public benchmark observations across 3 boards | Measured2 public benchmark observations across 2 boards |
| Input / 1M | $2.00 | $0.20 |
| Output / 1M | $12.00 | $0.40 |
| Pricing status | fresh | fresh |
| Context | 1M | 262K |
| Providers | 2 | 16 |
| Weight access | No linked weights | Open weights |
Decision facts
- Gemini 3.1 Pro Preview is #14; Gemma 4 31B is #37 on the same current language board.
- Index scores are 80.6 for Gemini 3.1 Pro Preview and 72.2 for Gemma 4 31B. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $12.00 for Gemini 3.1 Pro Preview and $0.40 for Gemma 4 31B. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $10.00 for Gemini 3.1 Pro Preview versus $0.60 for Gemma 4 31B. Gemma 4 31B costs 94.0% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
- Published context is 1,048,576 tokens for Gemini 3.1 Pro Preview and 262,144 for Gemma 4 31B.
- Weight access differs: Gemini 3.1 Pro Preview is none; Gemma 4 31B is open.
- ModelCap currently lists 2 providers for Gemini 3.1 Pro Preview and 16 for Gemma 4 31B.
These are separate published fields, not a synthetic winner. ModelCap does not collapse price, access, context, and capability evidence into a hidden recommendation score.
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Each comparison page is a permanent, shareable URL with the same live figures as this tool: ModelCap Index position, API pricing, context window, provider count, weight access and every shared benchmark board.