Dirac (https://github.com/dirac-run/dirac, https://dirac.run/) now supports gpt-5.6. This thing does now seem to be on the chatGPT/codex accounts yet.
UPDATE: it is now available in chatGPT account also, they rolled it out
I used to pride myself on not being the "fonts too pointy, scroll too buttery" crowd! But AI has brought me full circle and now nothing removes my interest in reading even a single word on a page faster than purple gradient greeble-afflicted tailwind-slop models put out without stronger prompting/references
That being said, maybe 5.6 can fix that!
Will be there soon according to the last commits in the codex repo: https://github.com/openai/codex/pull/31684/changes
Also, confirmed it works for me by using --model gpt-5.6-sol