GPT-5.5 is officially on its way out as OpenAI moves to the next generation.
This story is from 2026-09-15. It is preserved in the archive; the latest stories are on the live feed.
GPT-5.5 has been one of the models I’ve used quite a bit, so seeing it being retired/replaced feels a little strange. Model upgrades are obviously part of how AI moves forward, but sometimes newer doesn’t necessarily mean you’ll prefer the new model for everything.
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- 2026-09-15 21:47 · r/ChatGPT
GPT-5.5 is officially on its way out as OpenAI moves to the next generation.