Performance Comparison: Coding Agents Sol vs. Fable
ZainHasan6 · x · 2026-07-15
The author compared the performance of coding agents Sol and Fable. Under optimal configurations, Sol achieved a median of 53 execution steps taking 17 minutes, outperforming Fable's 62 steps and 21 minutes, demonstrating faster convergence and lower compute costs.
Additionally, their failure modes differ: when Sol fails, it has a 20% chance of breaking existing tests in the codebase (compared to 10% for Fable). Fable's failures are more likely to miss the final new test (with 65% of cases being near-misses).
Related event: Sol vs Fable: Coding Agent Benchmarks Show Specialization, Not Dominance(9 posts)→
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