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GPT six Astra is OpenAIs current flagship large language model released in early September twenty twenty six and widely regarded as their strongest general purpose system for complex professional work coding computer use and multi step agentic tasks with a context window of over one million tokens and pricing at ten dollars per million input tokens and fifty dollars per million output tokens
Claude Fable five point one is Anthropics most capable publicly available model also from September twenty twenty six belonging to their Mythos class but equipped with additional safety classifiers that make it suitable for general use it excels at long horizon coding research and knowledge work with the same pricing structure and a one million token context window
In pure chess engine strength measured on the CCRL forty fifteen list around October twenty twenty six Stockfish version nineteen sits at approximately three thousand six hundred fifty Elo as the clear number one Reckless version zero point nine point zero follows extremely closely at roughly three thousand six hundred forty four Elo while Torch version four d registers around three thousand six hundred thirty nine Elo
These three engines operate in an extremely narrow band where the rating gaps of only six to eleven points are smaller than typical measurement noise and in practical play under equal hardware and time controls the differences are almost invisible with draw rates exceeding ninety percent in direct matches Stockfish still holds a slight statistical edge through continuous open source refinement but
Reckless matches it in aggressive tactical sharpness and Torch performs at the same elite level especially in the specialized conditions of the Computer Chess Championship
To put the numbers in human perspective these engine ratings sit more than one thousand Elo above the strongest human grandmasters so any of the three would crush the world champion with near perfect accuracy the small gaps between them matter only in thousand game samples and for everyday analysis or play any of Stockfish Reckless or Torch can be treated as equally superhuman with Stockfish remaining the default public choice because it is free fully open and constantly updated while the other two represent the closest private and open source challengers respectively.