Model selection incomplete

I use the Codex CLI and the ChatGPT Linux Desktop App. I use both with API key, not any subscription. The Codex CLI always has the latest models to chose from (today it was 6.1 Terra). The ChatGPT Linux desktop app however stopped updating models at 6 Astra, 6 Sol and 6 Luna. All newer models are not available. I updated the ChatGPT Linux Desktop App to the newest version (26.1021.22027). No newer version is displayed for me. Does anyone have the same issue? Does anyone know any solution?