Kimi K3 vs Fable Coding Comparison
ssh4net · x · 2026-07-19
Benchmarked on a real bug in Cline using the same harness: both Kimi K3 and Fable 5 can fix the issue, but with different strengths.
- Fable 5 is faster: total time 3.5 minutes, 18 tool calls; Kimi K3 took 12 minutes, 34 tool calls.
- Kimi K3 is cheaper: used 1.2M tokens, costing $0.92; Fable 5 used 730K tokens, costing $2.13.
- The author believes the traces show Kimi is more like a model trained with reinforcement learning, spending more tokens on thinking and verification.
- Conclusion: this is the first time they've seen an open-weight model genuinely compete head-to-head with SOTA in a real coding-agent scenario.
Related event: Kimi K3 Evaluations Show Polarized Results and Harness Sensitivity(5 posts)→
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