Model decision surface
Compare AI models
Start with Gemini 3.1 Pro Preview and Muse Spark Open, 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 Muse Spark Open
Live dataset updated 10/15/2026, 6:39:42 PM UTC
Open 1200×630 evidence receipt| Field | Gemini 3.1 Pro Preview | Muse Spark Open Meta |
|---|---|---|
| ModelCap position | #9 | #15 |
| Index score | 81.1 | 79.6 |
| Evidence | Measured3 public benchmark observations across 3 boards | Estimatedpublisher-corpus-prior over 213 held-out anchors (22%); launch card against 5 resolved peers on 11 rows (78%); exceeds every named peer on 3 of 11 rows; optimism haircut 0 from cross-lab-probe; shrunk 1 up toward the measured corpus |
| Input / 1M | $2.00 | $1.25 |
| Output / 1M | $12.00 | $4.25 |
| Pricing status | fresh | fresh |
| Context | 1M | 1M |
| Providers | 2 | 4 |
| Weight access | No linked weights | Gated access |
Decision facts
- Gemini 3.1 Pro Preview is #9; Muse Spark Open is #15 on the same current language board.
- Index scores are 81.1 for Gemini 3.1 Pro Preview and 79.6 for Muse Spark Open. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
- Evidence differs: Gemini 3.1 Pro Preview is Measured; Muse Spark Open is Estimated.
- Listed output price per 1M tokens is $12.00 for Gemini 3.1 Pro Preview and $4.25 for Muse Spark Open. 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 $4.63 for Muse Spark Open. Muse Spark Open costs 53.8% 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 1,048,576 for Muse Spark Open.
- Weight access differs: Gemini 3.1 Pro Preview is none; Muse Spark Open is gated.
- ModelCap currently lists 2 providers for Gemini 3.1 Pro Preview and 4 for Muse Spark Open.
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.