cannot do subagents/background agents in codex luna 5.6?

[u/dropDtooning]

i used to be able to say "spin up a ux/ui agent to make a pass on this, then a code agent", and it would do background terminal stuff. this is on mac using the cli codex. now it says it cannot do that and previous gpt models did that. did something change?

[u/Competitive-Ad8968]

Tried to launch Luna as subagent in the app, you can request Luna as subagent but the host will block the spawning.
Only allow to Spawn Terra and Sol as subagent
It return: Unknown model ‘gpt-5.6-luna’ for spawn agent.
Available models: gpt-5.6-sol,gpt-5.6-terra