Opus 5 is a shocking step up from Fable 5 and 5.6 Sol for spreadsheets
Almost couldn’t believe our evals at first
A step function increase in intelligence, while as efficient as Sol
Feels like another Opus 4.5 moment for knowledge work
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We have been testing GPT 5.5 on the hardest spreadsheet tasks in the world (100k-1M+ cell complex models).
It is the Pareto frontier for spreadsheets -- SOTA accuracy, the fastest and the most efficient public model across effort levels.
OAI really cooked here
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