How to Try Claude Opus 5.5 Free in GitLab Duo

Hunting for a free way to test the newest AI models? GitLab Duo runs a trial that includes several frontier models, and one account gets you into all of them.

The trial covers Claude Opus 5.5, GPT-6 Sol, and GPT-6 Luna. Signing up costs nothing, and you choose the model inside Duo Chat rather than buying anything separate.

Tutorial

1. Open https://gitlab.com/ in your browser.
2. Create an account.
3. Activate the free trial. The trial is what opens up the Duo models for you.
4. Open Duo Chat.
5. Pick the model you want to try: Claude Opus 5.5, GPT-6 Sol, or GPT-6 Luna. Several of them sit in the same Duo Chat panel, so you can move between models without leaving it.

Wrapping Up

You now have a GitLab account on a free trial with three frontier models waiting in one chat panel. Start with whichever model you came for and see how it handles your own work. Keep in mind that which models you get and how long the trial lasts can change with your account and with GitLab's terms, so check what your trial actually includes before you build a habit around it.