GPT-5.5 not usable in Codex App for remote projects (works in CLI) #19370

What version of the Codex App are you using (From “About Codex” dialog)?

26.422.21637

What subscription do you have?

Plus

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What issue are you seeing?

GPT-5.5 is not usable in Codex App for remote projects.

In remote projects:

• GPT-5.5 either does not appear in the model picker, or
• appears but cannot be selected (selection does not apply)

However:

• GPT-5.5 works correctly in Codex CLI (both local and remote)
• GPT-5.5 works in Codex App for local projects

What steps can reproduce the bug?

1. Open Codex App on Windows
2. Connect to a remote project via SSH
3. Open the model picker
4. Attempt to select GPT-5.5

What is the expected behavior?

GPT-5.5 should be selectable and usable in remote projects, consistent with:

• Codex CLI (local and remote)
• Codex App (local projects)

Additional information

Environment:

• Codex App (Windows): 26.422.21637
• Codex CLI: 0.124.0
• Remote host: Linux (SSH)

Remote verification:
which codex
→ /usr/local/bin/codex

codex --version
→ codex-cli 0.124.0

codex -c model='gpt-5.5'
→ Works correctly

Config (both environments):
model = "gpt-5.5"

Notes:

• Issue only occurs in Codex App when using remote projects
• CLI confirms GPT-5.5 is fully available in the same remote environment
• Suggests a mismatch in model availability or selection handling in Codex App remote mode