Simon Willison(@simonw)

GPT-5.5 may not be in the official OpenAI API... but it's available via the apparently approved-of C...

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GPT-5.5 may not be in the official OpenAI API... but it's available via the apparently approved-of C...

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So I used that to make these pelicans (default and xhigh)! https://t.co/kIx2wnhpqD https://t.co/PP1JXhtEiM" / X

GPT-5.5 may not be in the official OpenAI API... but it's available via the apparently approved-of Codex API backdoor So I used that to make these pelicans (default and xhigh)! simonwillison.net/2026/Apr/23/gp

Image 1: It is a bit mangled to be honest - good beak, pelican body shapes are slightly weird, legs do at least extend to the pedals, bicycle frame is not quite right. (default reasoning level)
Image 1: It is a bit mangled to be honest - good beak, pelican body shapes are slightly weird, legs do at least extend to the pedals, bicycle frame is not quite right. (default reasoning level)

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Image 2: Pelican has gradients now, body is much better put together, bicycle is nearly the right shape albeit with one extra bar between pedals and front wheel, clearly a better image overall.
Image 2: Pelican has gradients now, body is much better put together, bicycle is nearly the right shape albeit with one extra bar between pedals and front wheel, clearly a better image overall.

read image description

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Romain Huet

@romainhuet

Mar 30

Replying to @bygregorr

We want people to be able to use Codex, and their ChatGPT subscription, wherever they like! That means in the app, in the terminal, but also in JetBrains, Xcode, OpenCode, Pi, and now Claude Code. That’s why Codex CLI and Codex app server are open source too! Image 3: 🙂