Siqi Chen(@blader):we found opus 5.5 to be 2X as efficient as gpt-6-sol in our internal https://t.co/QhA9tU0Lhp evals so i was not expecting 6.1-sol to improve on that much but to see it 3X the efficiency of opus 5.5 and 2.5X against even sonnet 5.5 is actually 🤯 this is an insane point release

Siqi Chen

@blader

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Siqi Chen@blader

2026.09.30 00:41

we found opus 5.5 to be 2X as efficient as gpt-6-sol in our internal evals so i was not expecting 6.1-sol to improve on that much but to see it 3X the efficiency of opus 5.5 and 2.5X against even sonnet 5.5 is actually 🤯 this is an insane point release