Ran FlappyBench on Muse Spark 1.3, Gemini 3.8 Flash, and Grok-4.6 with the same /design prompt.
- Muse Spark 1.3: 9/10 · $0.072. Nailed UI in 2 iterations with lowest cost
- Grok-4.6: 9/10 · $0.095 · Matched Muse’s output, but cost 2x more
- Gemini 3.8 Flash: 7/10 · $0.205 · Most expensive and not fully finished
Our engineering and design team has been testing 26+ side-by-side comparisons across frontier and open models. All runs are public and open source. Benchmark for this demo here: github.com/CommandCodeAI/slash-design-showcase/tree/main/flappy-bird
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