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The new Code Arena Fullstack rankings evaluate AI models on full-stack web development tasks; Kimi K3 (Max) takes first place, followed by GPT-5.6 Sol and Claude Fable 5.
OpenAI's GPT-5.6 Sol model has tied for first place with Claude Fable 5 on Code Arena: Frontend, marking its first appearance at the top of the Code Arena leaderboard and showing significant progress in agentic coding and frontend development.