Some notes on GPT-5.1, which is now available in the OpenAI API
The new reasoning options are interesting, but the pelican feels like a bit of a regression from GPT-5 https://simonwillison.net/2025/Nov/13/gpt-51/
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@simon that forced reasoning was slowing down gpt5 a lot. I’m looking forward to test how this 5.1 performs now. PD: i laugh so hard about the pelicans benchmark yesterday
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