gpt-realtime has a knowledge cutoff date of Oct 01, 2023 – the same date as GPT-4o https://
platform.openai.com/docs/models/gp
t-realtime
… The GPT-5 knowledge cutoff date is Sep 30, 2024, which makes me suspect that gpt-realtime may be a more similar model to GPT-4o than to GPT-5

→ View original post on X — @simonw,