Model decision surface
Compare AI models
Start with Claude Fable 5.1 and Gemini 3.1 Pro Preview, 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
Claude Fable 5.1 vs Gemini 3.1 Pro Preview
Live dataset updated 9/3/2026, 2:31:57 AM UTC
Open 1200×630 evidence receipt| Field | Claude Fable 5.1 Anthropic | Gemini 3.1 Pro Preview |
|---|---|---|
| ModelCap position | #2 | #8 |
| Index score | 84.1 | 78.5 |
| Evidence | Measured2 public benchmark observations across 2 boards | Measured4 public benchmark observations across 4 boards |
| Input / 1M | $10.00 | $2.00 |
| Output / 1M | $50.00 | $12.00 |
| Pricing status | fresh | fresh |
| Context | 1M | 1M |
| Providers | 4 | 2 |
| Weight access | API only | API only |
Decision facts
- Claude Fable 5.1 is #2; Gemini 3.1 Pro Preview is #8 on the same current language board.
- Index scores are 84.1 for Claude Fable 5.1 and 78.5 for Gemini 3.1 Pro Preview.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $50.00 for Claude Fable 5.1 and $12.00 for Gemini 3.1 Pro Preview.
- Published context is 1,000,000 tokens for Claude Fable 5.1 and 1,048,576 for Gemini 3.1 Pro Preview.
- ModelCap currently lists 4 providers for Claude Fable 5.1 and 2 for Gemini 3.1 Pro Preview.
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.