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Arena.ai has announced the first-round comparative test results for Kimi K3.1 Pro. On October 24, 2026, Arena published @petergostev's first-hands-on test of Kimi K3.1 Pro, covering 3D scenes, HTML animations, websites, UI construction, and research-oriented pages, and compared the model with K3, Opus 5.5, Sonnet 5.5, GPT-6.1 Sol, Gemini 4 Argon, and other models. Currently, these results are published by Arena as a single source, and there are no subsequent developments or facts yet.
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Arena hands-on: Kimi K3.1 Pro first impressionsDevelopments
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Oct 24
Arena
Arena hands-on: Kimi K3.1 Pro first impressions
Arena has published @petergostev's first impressions of Kimi K3.1 Pro, with tests covering 3D scenes, HTML animations, websites, UI building, and research-oriented pages, compared against models including K3, Opus 5.5, Sonnet 5.5, GPT-6.1 Sol, and Gemini 4 Argon.