GPT-6 Astra and Claude Opus 5.5: Tested on a Web Snake Game

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The recently updated AI models GPT-6 Astra and Claude Opus 5.5 are being evaluated on the creation of a playable snake game in a browser. The test relies on classic rules and specific constraints to allow for a concrete and measurable comparison.
A web game with states, saving, and touch controls required
The test requires the creation of a playable snake game in a browser, incorporating start, pause, end game, and restart states. The highest score must be recorded using localStorage. Swipe controls are required for touch devices, and responsiveness of the controls is expected.
The snake moves on a grid with keyboard control
The snake moves on a grid and is directed using the keyboard's arrow keys or the WASD keys. When the snake consumes food, its size increases along with the score, and it is imperative that the food never appears inside the snake's body. The game ends if the snake collides with a wall or its own body. Instant 180° turns are prohibited, and the game's speed gradually increases with the score.
A practical task to compare Astra and Opus 5.5
The prompt used asks for the construction of a polished snake game for the browser. This choice aims to provide a concrete and sufficiently simple task to measure the performance of the AI models. This evaluation comes as OpenAI has updated its Astra model and Anthropic its Opus 5.5 model, both considered benchmarks to compare against the same prompt.
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