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Product Launch

Kimi K3 Vs Claude Fable 5 on DeepSWE: Cost and Coding

We ran 452 DeepSWE rollouts on Kimi K3 and Claude Fable 5.

Fable leads pass@1 by 1.4 points; Kimi K3 wins pass@4 and delivers 2.8x the solves per dollar.

Why It Matters

Transitions AI from a passive assistant to an active developer partner capable of multi-step planning and repository-level code execution.

Implications

  • Increases engineering throughput by automating boilerplates, bug resolution, and pull request generation.
  • Highlights a shift toward system designs that run tools, execute shells, and self-correct.

Strategic Outlook

Moves the industry closer to autonomous systems, shifting the engineer's role from writing syntax to system design and review.

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