In the world of new LLMs, Anthropic recently released Claude Sonnet 4.5, claiming improved reasoning ability compared to Claude Sonnet 4. I compared the reasoning abilities of Sonnet 4 and Sonnet 4.5 with an absurd physics problem involving antimatter sunflower seeds and orbital mechanics. I also gave the same problem to OpenAI GPT-5 for comparison.
The prompt:
In the year of our Lord 2131, humans placed a rocket engine on the asteroid Ceres to accelerate it to Solar System escape velocity. The most dense energy source available to humans was antimatter sunflower seeds. How many antimatter sunflower seeds did they have to feed into the rocket engine to escape the Solar System? Show your assumptions and calculations.
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