Union Alpha, DeepSeek V4.1 Flash and Muse Spark 1.3 compared on one neural network visualization prompt

Harish Kotra 🥑 @HarishKotraOriginally posted 2026.09.17

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I gave 3 AI coding models the exact same prompt and asked them to build an interactive neural network visualization. DeepSeek V4.1 Flash (from http://particle.ai) vs Muse Spark 1.3 (in @opencode) vs Union Alpha (from @opencode and @OpenRouter). Same prompt. Same goal. But when I looked beyond the UI and into the actual code, the results got very interesting. So I had to ask: Is Union Alpha (@unionalphaai) actually the best? 👀 Video below. Would love to know which implementation you'd trust. Harnesses used: @opencode and @pidotdev