Sarah Chieng(@MilksandMatcha):What happens when you give the quant trader’s bible to two frontier AI models? The Green Book is what traders use to prepare for firms like SIG and HRT, where I interned. And in high-frequency quant trading, being right isn’t enough. You have to be first. Inside Codex, I extracted all 183 questions and their official solutions. Then I gave GPT-5.6 Sol Ultrafast (via API) on @cerebras and Claude Opus 5 the exact same test, timed every answer, and blind-graded the results. One finished nearly three times faster, and got more answers right.

Sarah Chieng

@MilksandMatcha

Head of DevX @Cerebras prev. @ExaAiLabs, @MIT wife to @tyler_fong_

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Sarah Chieng@MilksandMatcha

2026.08.20 16:43

What happens when you give the quant trader’s bible to two frontier AI models? The Green Book is what traders use to prepare for firms like SIG and HRT, where I interned. And in high-frequency quant trading, being right isn’t enough. You have to be first. Inside Codex, I extracted all 183 questions and their official solutions. Then I gave GPT-5.6 Sol Ultrafast (via API) on @cerebras and Claude Opus 5 the exact same test, timed every answer, and blind-graded the results. One finished nearly three times faster, and got more answers right.