Kimi K3 Is Competitive with Fable; Kimi K3 and Fable Is SoTA
A performance study indicates that the open-source model Kimi K3 is competitive with the closed-source Fable 5 model across various agentic tasks. The findings suggest that routing tasks between different models can achieve state-of-the-art performance at a lower cost.
Why it matters
This highlights the growing viability of open-source AI models and the efficiency gains possible through intelligent task routing in enterprise AI workflows.
Product Solutions Models Pricing Resources Log In Get Started Blog Kimik3 Fable Kimi K3 is competitive with Fable; Kimi K3 + Fable is SoTA. PUBLISHED 7/21/2026
ChatGPT Claude Grok Perplexity CoPilot Gemini Table of Contents How We Measured K3 is a good model. Two Models is Better than One K3 can be up to 50x lower cost on Fireworks. 🫳🎤 Don't pick a model. Route. K3 is cost optimized on all work types Single Models Are Wasteful and No Longer SoTA Table of Contents K3 is a frontier quality open model at a fraction of the cost. Even bigger is that it complements Fable predictably, which makes it possible to get the highest quality intelligence by routing tasks.
🧭 tl;dr: We ran Kimi K3 (open) against Fable 5 (closed) on ~1,000 agentic tasks finding:
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