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Can frontier LLMs multiply numbers without using external tools?

Can frontier LLMs multiply numbers without using external tools? Absolutely. Claude Opus 5 gets 100% accuracy on…

This is a AI post classified by Jev as Frontier models (a model release), kept by the AI Radar because it carries real work, not commentary.

Can frontier LLMs multiply numbers without using external tools? Absolutely. Claude Opus 5 gets 100% accuracy on multiplications up to 20x20 digits (1200/1200 correct). This accuracy does require max reasoning, however! It's an extremely simple eval, but it becomes relevant again for measuring no-CoT capabilities, particularly of recurrent-depth architectures (such as GPT-6-Astra).

Posted by Maksym Andriushchenko (7.6k followers) 3 days ago · 274 likes · 22.3k views · view the original post on X. Kept by the AI Radar as Frontier models.

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