ChatGPT Pro Extended may be switching models without notice
r/OpenAIJun 18, 2026 · 24d ago
users in may be getting moved to instead of the model they expected. The change appears to happen without a clear warning or explanation. The issue was described as starting on June 18, 2026, and a was shared as evidence of the unexpected model label.
Key points
on may be routing some work to .
The reported problem is that the switch happens without clear notice.
The issue was said to have started on June 18, 2026.
People using ChatGPT for coding should check which model is actually active.