# Where to Use Which Model — and Where the Premium is Justified

## Model Overview
- **Models: **
  - Luna
  - Terra
  - Sol
  - Opus 4.8
  - Sonnet 5
  - Fable 5

## Cost Breakdown
- **Cost Ladder (Luna→Terra→Sol)**
  - Connected per family.
  - Flat = paying more buys nothing; steep = cost buys reliability.

## Performance Insights
- Anthropic models shown muted (refusal-dragged on this distribution).
- Hover any point for CI, cost, and quality-per-$.

## Pricing and Reliability
- **Cost / Call ($, log scale)**

### Reliability Metrics
- 90% reliability bar
- Cheap tier already wins in the arithmetic context.
- Cost buys reliability in symbolic rules.
- Near-ceiling for all data transform capabilities.