You now have more chat models to choose from in your Threads, and Euryka will warn you before you switch to a model that costs noticeably more per message. This helps you pick the right tool for each task while keeping an eye on your usage.
What's new
Five additional models are available in the model selector:
GPT 5.6 Sol
GPT 5.6 Terra
GPT 5.6 Luna
Grok 4.5
Muse Spark 1.1
As with every model in Euryka, these all follow your Brand Hub context automatically, so your brand voice and guardrails carry across whichever one you use.
How to use it
Open a Thread and find the model dropdown at the top of the message composer.
Select the model you'd like to use for your next messages.
Carry on with your brief. Your brand context is applied whichever model you pick.
Cost-warning confirmations
Some models cost more to run than others. When you switch to one of the higher-cost models, Euryka now shows a confirmation prompt before the change takes effect. The prompt explains how the model's cost compares to a lower-cost option, so you can decide whether it's worth it for the task in front of you.
You'll only see this prompt when switching to a flagged higher-cost model. Confirm to apply the change, or cancel to stay on your current model.
Tips
Use a lower-cost model for drafting and exploration, then switch to a higher-cost model for the passes that need the most capability.
If a confirmation prompt appears, read the comparison it shows before confirming. It's there to help you avoid unexpected usage.
Not sure which model suits a task? Euryka can route work to the best model for the job automatically. See how Threads orchestrate models.