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GPT 5.5 seems to be degraded

OpenAI Developer Community May 26, 2026
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thats a very peculiar observation, it feels exactly like 5.3 codex, where to fix even simple bugs takes way more prompts than it used to. the only way its useful is to keep using xhigh/high its weird because i been using 5.5-med without issues and now its suddenly no longer useful

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