Currently, subscribers on the Plus plan get access to GPT-5.6 Terra and Claude Sonnet 4.6. In addition to the Plus plan models, subscribers on the Pro plan also get Claude Opus 4.8 and GPT-5.6 Sol. We regularly add support for new models soon after they're released. You can always find an up-to-date list of models by visiting Duck.ai and clicking on the model picker drop-down menu, or on this help page.