https://x.com/kevinweil/status/1889924247075815737

Wait, what is the statement here? This is really hard to follow. Is it just GPT5 has function calling or it has a specific function to call a reasoning model?

@0xSMW The latter. How do you think i could rephrase the title to remove that ambiguity?

@Bayesian “Will OpenAI introduce a new capability for chat models to call reasoning models” something like this

@0xSMW “Will OpenAI introduce a capability for GPT-5 to call the o1 family of reasoning models”, is this clear

@0xSMW Neither, it seems like he's stating here that reasoning capabilities will just be part of the GPT-5 model itself, no routing to any separate model. Simply chatting and reasoning capabilities all in one model.

They might update gpt-4o to dispatch to o1 on some questions before the release of gpt-5