First Kimi K3.1 Pro benchmarks compare it against Opus 5.5, Sonnet 5.5 and Gemini 4

arena · x · 2026-10-24

LMArena shares Peter Gostev's first impressions of Moonshot AI's Kimi K3.1 Pro, tested across 3D scenes, HTML animations, websites, UI builds, and research-driven pages.

The comparison lineup includes K3, Opus 5.5, Sonnet 5.5, GPT-6.1 Sol, and Gemini 4 Argon, among others. The full video and Peter's original prompts are available on LMArena's YouTube channel.

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