GPT-6-Astra reportedly can't run without CoT; even 'low' effort hits 99.6% multiplication accuracy
maksym_andr · x · 2026-09-17
In a follow-up to his multiplication eval, maksymandr found GPT-6-Astra cannot run without CoT — the lowest available effort setting is 'low', yet it still achieves near-perfect 99.6% multiplication accuracy at that setting.
This complements his earlier finding that Claude Opus 5 hits 100% on 20x20-digit multiplication at max reasoning, framing no-CoT capability as a key metric for recurrent-depth architectures.
Related event: Frontier LLMs Nail 20-Digit Multiplication Without Tools(9 posts)→
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