Quant trader says Claude Opus 5.5 keeps flagging routine HFT work as "cyber"
human__no_9291 · reddit · 2026-10-20
A quant trading shop owner building high-frequency trading algorithms reports that Claude Opus 5.5 constantly flags his sessions as "cyber" violations, even though his work is fully legal, exchange-compliant, and unrelated to security—and the model knows it. He notes Fable 5.1 doesn't trigger the flagging but delivers noticeably worse output quality. He's asking whether others are being falsely flagged for normal work.
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