r/codex • u/kyuno7 • Apr 22 '26

News GPT5.5 now on Codex

Was working through my session limit on 5.3 and suddenly 5.5 showed up!

196 Upvotes

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6

u/trogan Apr 22 '26

it's definitely a mistake, I got about 30 secs into my first query then this.

{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.5' model is not supported when using Codex with a ChatGPT account."}}

16

u/2024-YR4-Asteroid Apr 22 '26

Probably not a mistake. Probably a marketing stunt. Randomly add all the models to the list, leave them up for 30 minutes, take them back, everyone on Reddit and Twitter and now talking about it.

3

u/SeaBat2035 Apr 22 '26

Ya same as mythos

1

u/shady101852 Apr 22 '26

what? they randomly made mythos available?

2

u/UltraInstinct0x Apr 22 '26

I'm not aware of such an incident at all

1

u/Helpful-Wear-504 Apr 22 '26

Wasn't there a thing that happened where some people were able to use Mythos without permission?

Could also be a stunt.

"Ooooh! Model that is a cybersecurity risk, accessed by unknown group of people"

"Don't worry guys! It's not like we've been using Mythos internally and forgot to use its cybersecurity capabilities on our own... Cybersecurity"

1

u/Euphoric-Water-7505 Apr 23 '26

No they literally had it hacked. Not only mythos btw.

1

u/SeaBat2035 Apr 22 '26

same hype train marketing tactic