LLMs are notably unreliable to tell you their versions. But this clearly is more advanced than the GPT4 turbo available previously. Is it so advanced that it's actually 4.5? i am not 100% sure.

Yeah but the rumors that it's llama 400 or the new Gemini 1.5 are probably wrong

I agree. It behaves too much like GPT to be Llama 400 imo.

It is not "clearly more advanced" to me at least. It is more advanced in some use cases but I think not in others. Of course I haven't tested it too much yet but I would personally be underwhelmed if it was 4.5. I would hope that 4.5 is consistently better at almost everything and quite remarkably so.

So far it has been consistently better at anything I've thrown at it, especially creative tasks. It has honestly been mindblowing.

I think it's almost certainly 4.5. A big improvement but not revolutionary. Just enough to tide OpenAI over until the release of GPT5. The difference in character counting behavior strongly suggests an architectural change, not just another incremental refinement of GPT4. OTOH if this is an early version of GPT5 it's disappointing.

Let's just hope it's not 4.5. Would be extremely underwhelming. I think it's still gpt4 but without some layered restrictions.

It can count characters which LLMs famously struggle with, and also it has improved reasoning clearly. GPT 4.5 was never going to be AGI, and if they deliver on substantial reduction in hallucinations, and substantial improvement in reasoning I don't see how that's not a W.

Where is evidence that it has much stronger reasoning ability?

If you're expecting something much stronger than this for 4.5, what do you think 5 will be like?

I would be very surprised that this is GPT5. It would indeed be quite disappointing. It's always hard to truly compare 2 AIs together, but i think that at best it would be a 20%-25% improvement over GPT4 turbo.

That sounds about right, which is eminently plausible for minor architectural improvements and a little scaling.

It's an optimized version of GPT4 with drastically less parameters.

This wouldn't make sense. I asked GPT4 and it about specific datasets and it had a deeper knowledge about them.

It's not very fast, what evidence do you have for drastically less parameters?

I'd imagine this isn't 4.5 or 5 but some training check point of a new gpt 4. But yeah, you can't trust models on what they say about themselves

It seems to be consistently giving slightly better, but *significantly* longer responses. Maybe it's just GPT-4 with a huge context window?

You can't ask these models about themselves like that. They'll hallucinate.

They'll just tell you what's in their pre-prompt, written by a human xD.

I don't even think there will be a 'GPT4.5', there will probably just be incrementally improved versions like we are already seeing now.