Frontier Model API Behavior Changes Abruptly
gaganghotra_ · x · 2026-07-13
The author reports a jarring experience with a frontier model API: its behavior changed drastically after just a two-hour gap.
They noted typically using prompts packed with constraints and if/else rules, which the model strictly adhered to for the past 16 hours. However, it suddenly began ignoring these instructions, making the shift feel "very strange."
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