Sol is More Stable, Fable is More Expensive
ZainHasan6 · x · 2026-07-15
This adds a comparison of reliability and pricing between Sol and Fable.
Reliability
- Across 26 early configurations, no model exceeded 80% reliability
- Sol peaked at 84.3%, achieving a 4/4 pass rate on 61 tasks
- Fable peaked higher at 88%, compared to Sol's 85.8%, creating more "magic moments"
Cost
- Sol high: $3.47/rollout
- Fable xhigh: $13.41/rollout
- This means Sol costs roughly 1/4 as much, yet achieves similar or even better cost-effectiveness under certain configurations
The author concludes: Fable is stronger but more expensive, while Sol is cheaper and more stable.
Related event: Sol vs Fable: Coding Agent Benchmarks Show Specialization, Not Dominance(9 posts)→
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