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YC

Y Combinator Cast

03/11/25

@ Y Combinator

Reactions to GPT-4.5 have been muted because its improvements over GPT-4 are seen as relatively incremental, despite this launch being an important milestone for future models.

Video

GPT-4.5 = Big Model Energy | YC Decoded

@ Y Combinator

GPT-4.5 = Big Model Energy | YC Decoded

03/11/25

Related Takeaways

Sam Altman

04/11/25

@ OpenAI

When we launched GPT-4.5, we were proud of the model, but users liked it much more than we anticipated, expressing that it was significantly better than GPT-4 in various ways.

Y Combinator Cast

03/11/25

@ Y Combinator

GPT-4.5 is potentially more than 10 times the size of GPT-4, representing a step forward in both pre-training and post-training processes.

OpenAI Cast

04/11/25

@ OpenAI

The sheer volume of work required for GPT-4.5 was a byproduct of the model's specifications, necessitating changes that couldn't be achieved with the same stack used for GPT-4.

OpenAI Cast

05/09/25

@ OpenAI

We integrated some of the improvements from GPT-4.5 into our mainline GPT-4 model to enhance its collaborative capabilities.

OpenAI Cast

04/11/25

@ OpenAI

In testing GPT-4.5, we found it has nuanced abilities that were unexpected, indicating it is more intelligent in ways that are hard to characterize ahead of time.

OpenAI Cast

05/09/25

@ OpenAI

The main advantages of GPT-4 include faster response times, sharper reasoning that reduces misunderstandings, and more natural language that feels relatable rather than robotic.

Sam Altman

06/18/25

@ OpenAI

The distinction between model versions like GPT-4 and GPT-5 is becoming less clear, as continuous improvements blur the lines between iterations.

OpenAI Cast

05/09/25

@ OpenAI

In February, we launched the research preview of GPT-4.5, which is more intuitive and collaborative than previous models, making collaboration significantly easier.

Y Combinator Cast

01/24/25

@ Y Combinator

GPT-3 represents a huge leap forward, not just a small improvement over its predecessors, and researchers believe this trajectory will continue.