GPT 5.5 seems to be degraded
OpenAI Developer Community
May 26, 2026
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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