Tested FlappyBench on Qwen 3.8 27B, DeepSeek V4 Pro 0813, and Gemini 3.7 Flash with /design command. All scored 9/10, it comes down to cost, quality, and iterations.
- DeepSeek V4 Pro ($0.0036): Low cost, solid, but movement and spacing need work.
- Qwen 3.8 27B ($0.0068): One-shot, playable, with minor UI finish.
- Gemini 3.7 Flash ($0.0083): Needed 2–3 iterations to catch up.
Qwen for the best one-shot. DSV4 for the best value.
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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