Opus and Qwen do a Sokoban

Comparing Claude Opus 5.5 vs Qwen3.8-Flash-Next, running locally, on the same coding task: Sokoban! In a slightly different setup than usual, I ran Claude Opus 5.5 and Qwen3.8-Flash-Next through the chatbot interface (not a coding agent); Qwen I ran via llama.app (quantized to 4 bits on an AMD Strix Halo machine with 128GB of unified RAM). The prompt was a one-liner: “Create a simple but beautiful Sokoban game clone in HTML/JS/CSS (all in one file, no frameworks or 3rd-party libraries).“ Opus (high reasoning effort) took ~4 minutes (I don't have a token count because this was from a web chatbot interface). Qwen took ~31 minutes and 64k tokens. 80% of this was for reasoning (at extra-high effort). Qwen thinks a lot more than Opus! Both are available at my vibecode benchmarks page. Here's also a side-by-side playthrough of both: Watch the video I then had GPT-6 Astra compare the quality of the implementations. I chose Astra so as to not have any bias towards a solution (in case models…

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