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OpenAI: Our new model GPT-5-Codex-Mini – a more cost-efficient GPT-5-Codex

https://github.com/openai/codex/releases/tag/rust-v0.56.0
16•wahnfrieden•1h ago

Comments

vessenes•1h ago
Looks like a leak: https://platform.openai.com/docs/models does not list it, and codex-mini-latest says that it's based on 4o. I wonder if it will be faster than codex; gpt-5-nano and -mini are still very slow for me on API, surprisingly so.
ChadNauseam•43m ago
I noticed the same thing with -mini. It can be even slower than the full fat version. I'm guessing their infra for it is very cost-optimized to help them offer it at such a low price
simonw•42m ago
They announced it on Twitter yesterday: https://x.com/OpenAIDevs/status/1986861734619947305 and https://x.com/OpenAIDevs/status/1986861736041853368

> GPT-5-Codex-Mini allows roughly 4x more usage than GPT-5-Codex, at a slight capability tradeoff due to the more compact model.

> Available in the CLI and IDE extension when you sign in with ChatGPT, with API support coming soon.

cmdtab•23m ago
If any open AI devs reading this comment section: is it possible for us to get api access at runable.com ?
bgwalter•11m ago
All "AI" providers cut corners in the models right now because the subsidized cost is unsustainable.

Grok's latest update made it far worse than the version right after the Grok-4 release. It makes outright mistakes now. Copilot has cut corners long ago. Google "AI" was always horrible.

The whole "AI" experiment was an outrageously expensive IP laundering parlor trick that is meeting economic realities now.

stavros•6m ago
That's a very long-winded way of saying "it was subsidized so it could capture a large market segment, and now that's stopping", which is what SV companies have done since checks notes forever.

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https://www.nature.com/articles/s41586-025-09670-z
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