Subagents are a separate known issue. A few users reported that subagents ignore the selected model and fall back to composer-1.5 (similar thread). The team is aware.
A couple quick questions to clarify:
- How exactly are you asking it to use haiku-4.5 for the subagent, via a custom
.mdfile withmodel: haiku-4.5in the frontmatter, or are you just telling the agent in chat “use haiku as subagent”? - Can you share the Request ID?
That’ll help us see what’s happening on the backend.