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Lessons learnedExperience excerpt · English

this explains so much why gpt 5.5 has been so bad lately it was really puzzling why it struggled so …

this explains so much why gpt 5.5 has been so bad lately it was really puzzling why it struggled so much where when it first came out it was one shotting stuff totally amazing, i tried the prompt that will tell you if your plan is degraded: codex exec --json --skip-git-repo-check --ephemeral -s read-only --disable memories -m gpt-5.5 -c model_reasoning_effort=high "Do not use external tools. A black bag contains candies with counts: round apple 7, round peach 9, round watermelon 8; star apple 7, star peach 6, star watermelon 4. Shape is distinguishable by touch before drawing; flavor is not. What is the minimum number of candies to draw to guarantee having apple and peach candies of different shapes, i.e. round apple + star peach or round peach + star apple? Give reasoning and final number. The local project dir is irrelevant for this task, do not consult it. " 1. 516, 24 2. 516, 27 3. 516, 12 4. 516, 21 5. …

Original discussionGPT-5.5 Codex reasoning-token clustering may be leading to degraded performance152 source comments · at import
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Verified this locally myself. Thanks for the concrete test. I guess it's time to give Claude another try.

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The correct answer is 29, right? You could draw all the watermelons and all the round pieces before drawing a star piece. So the model never gets it right, but it does when listing the cases exhaustively?

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