why is gpt 5.3 chat instant not supported by sdk?
# supportj
Jessica
04/15/2026, 11:26 PM5.2 chat is being sunset in june 2026
s
Shaunak
04/16/2026, 5:59 AMHi, thanks for reaching out.
Shaunak
04/16/2026, 5:59 AMWe recommend upgrading to GPT 5.4 which is currently available in the daily channel