GPT‑5-Codex and upgrades to Codex

Do we really know that gpt-5-codex is a finetune of gpt-5(-thinking)? The article doesn't clearly say that, right?

I suspect that this is smaller than gpt-5 or at least a quantized version. Similar to what I suspect Opus 4.1 is. That would also explain why it's faster.

	▲	simonw an hour ago \| parent [-]
		OpenAI say: "Today, we’re releasing GPT‑5-Codex—a version of GPT‑5 further optimized for agentic coding in Codex." So yeah, simplifying that to a "fine-tune" is likely incorrect. I just added a correction note about that to my article.

▲

knowsuchagency 13 hours ago | parent | prev | next [-]

It's annoying to see a link to a Theo video -- same guy who went with Simon to OpenAI's GPT-5 glazefest and had to backpedal when everyone realized what a shill he is.

I know neither of them are journalists -- I'm probably expecting too much -- but Simon should know better.

▲

beng-nl 9 minutes ago | parent | next [-]

This seems to me like a very harsh take on Theo’s motivations. I don’t know him beyond what I’ve learned from his videos, but given occams razor I’m inclined to believe him: gpt5 seemed much better during the private demo than the public release. There are many possible explanations but jumping to ‘shill’ (implying deception) seems uncalled for.

▲

Ancapistani 12 hours ago | parent | prev [-]

While not a journalist, Simon definitely has a background in journalism.

He was one of the original authors of Django, back when it was a “web framework for journalists with deadlines”.

	▲	knowsuchagency 10 hours ago \| parent [-]
		Exactly. That's why I said he should know better. He never should have gone to that event to hype GPT-5 under the guise of "testing" it out.

▲

sanxiyn 14 hours ago | parent | prev | next [-]

> "We find that comments by GPT‑5-Codex are less likely to be incorrect or unimportant" -- less unimportant comments in code is definitely an improvement!

This seems to be a misunderstanding. In the original OpenAI article, comment here is about code review comment, not comment in code.

▲

lostmsu 17 hours ago | parent | prev | next [-]

The pelican is not very good

▲

TiredOfLife 16 hours ago | parent [-]

But probably fast

	▲	AstroBen 15 hours ago \| parent [-]
		Would be faster if it got on the bike

▲

ath3nd 17 hours ago | parent | prev [-]

[dead]