[oersted]

I believe you are looking at GPT 5.4 Pro. It's confusing in the context of subscription plan names, Gemini naming and such. But they've had the Pro version of the GPT 5 models (and I believe o3 and o1 too) for a while.

It's the one you have access to with the top ~$200 subscription and it's available through the API for a MUCH higher price ($2.5/$15 vs $30/$180 for 5.4 per 1M tokens), but the performance improvement is marginal.

Not sure what it is exactly, I assume it's probably the non-quantized version of the model or something like that.

[logicchains]

>It's the one you have access to with the top ~$200 subscription and it's available through the API for a MUCH higher price ($2.5/$15 vs $30/$180 for 5.4 per 1M tokens), but the performance improvement is marginal.

The performance improvement isn't marginal if you're doing something particularly novel/difficult.

[nsingh2]

From what I've read online it's not necessarily a unquantized version, it seems to go through longer reasoning traces and runs multiple reasoning traces at once. Probably overkill for most tasks.

[ZeroCool2u]

Yup, that was it. Didn't realize they're different models. I suppose naming has never been OpenAI's strong suit.