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GPT-5.3-Codex

983 pointsby meetpateltechyesterday at 6:08 PM377 commentsview on HN

Comments

simianwordsyesterday at 6:21 PM

Any notes on pricing?

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bg24yesterday at 7:17 PM

I am on a max subscription for Claude, and hate the fact that OpenAI have not figured out that $20 => $200 is a big jump. Good luck to them. In terms of model, just last night, Codex 5.2 solved a problem for me which other models were going round and round. Almost same instructions. That said, I still plan to be on $100 Claude (overall value across many tasks, ability to create docs, co-work), and may bump up OpenAI subscription to the next tier should they decide to introduce one. Not going to $200 even with 5.3, unless my company pays for it.

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jiggawattsyesterday at 10:29 PM

I think this announcement says a lot about OpenAI and their relationship to partners like Microsoft and NVIDIA, not to mention the attitude of their leadership team.

On Microsoft Foundry I can see the new Codex 4.6 model right now, but GPT-5.3 is nowhere to be seen.

I have a pre-paid account directly with OpenAI that has credits, but if I use that key with the Codex CLI, it can't access 5.3 either.

The press release very prominently includes this quote: "GPT‑5.3-Codex was co-designed for, trained with, and served on NVIDIA GB200 NVL72 systems. We are grateful to NVIDIA for their partnership."

Sounds like OpenAI's ties with their vendors are fraying while at the same time they're struggling to execute on the basics like "make our own models available to our own coding agents", let alone via third-party portals like Microsoft Foundry.

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maheshrijalyesterday at 6:17 PM

It seems Fast!

I_am_tiberiusyesterday at 6:41 PM

I'd like to know if and how much illegal use of customer prompts are used for training.

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mrcwinnyesterday at 9:08 PM

According to Sam Altman, Anthropic is for "rich people." Judging by his $4 million man-baby Koeniggsegg, he must be a huge Claude Code user!

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drcongoyesterday at 8:57 PM

Does it insert adverts in your code?

roya51788yesterday at 6:56 PM

what are the benchmarks against opus 4.6?

petetntyesterday at 8:57 PM

Whoa, I think GPT-5.2-Codex was a disappointment, but GPT-5.3-Codex is definitely the future!

hubraumhugoyesterday at 6:57 PM

Anybody else not seeing it available in Codex app or CLI yet (with Plus)?

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heraldgeezeryesterday at 6:45 PM

Anthropic and GTP 2 new models at once?

wahnfriedenyesterday at 6:42 PM

Pelican seems much worse than the Opus 4.6 one (though the bicycle is more accurate):

https://gist.github.com/simonw/a6806ce41b4c721e240a4548ecdbe...

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OutOfHereyesterday at 6:33 PM

It is absurd to release 5.3-Codex before first releasing 5.3.

Also, there is no reason for OpenAI and Anthropic to be trying to one-up each other's releases on the same day. It is hell for the reader.

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raincoleyesterday at 6:17 PM

Almost like Anthropic and OpenAI are trying to front run each other

nubgyesterday at 8:19 PM

lmao so cringe that they delay releasing the model until anthropic does

copilot_kingyesterday at 6:38 PM

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xystyesterday at 9:02 PM

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mannanjyesterday at 6:34 PM

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verdvermyesterday at 6:15 PM

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copilot_king_2yesterday at 6:34 PM

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shibeprimeyesterday at 6:23 PM

I know we just got a reset and a 2× bump with the native app release, but shipping 5.3 with no reset feels mismatched. If I’d known this was coming, I wouldn’t have used up the quota on the previous model.

maxpertyesterday at 6:31 PM

Is this me or Sam is being absolute sore loser he is and trying to steal Opus thunder?

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