Mobile: choose Codex Cloud model and code directly from ChatGPT app

Feature request

The ChatGPT mobile app should let users open Codex, connect directly to Codex Cloud, select a GitHub repository, explicitly choose which Codex model to use, and start coding entirely from the app — similar to Cursor’s cloud-agent workflow.

The key missing capability is model selection in Codex Cloud.

Today, when launching a Codex Cloud task, users cannot explicitly select the model they want to use. This means that even if models such as GPT-5.5, GPT-5.6 Sol, or GPT-6 Astra are available to the account, there is no way to choose which one executes the cloud coding task.

The ideal flow should be:

ChatGPT App → Codex → Codex Cloud → Select Repo → SELECT MODEL → Code / Test / Commit / PR

Model selection should be a first-class control in Codex Cloud, not an automatically chosen hidden setting.

A user should be able to pick the desired model before starting a task and, where technically possible, switch models during an existing coding session.

No desktop computer, Codespaces, SSH client, VPS terminal, or other external development environment should be required.

The ChatGPT mobile app itself should be sufficient to run a complete cloud coding workflow with Codex.

No files, tests, or entry points are named. Start by locating the mobile Codex Cloud workflow and its model-selection controls, then determine how repository selection and task execution are wired; done means users can choose a model before starting a task and complete the stated coding workflow from the app.