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Choosing Core, Plus, or Ultra for your use case
Not every call needs premium cloning. Match model quality to volume, brand, and conversation complexity.
Alex Rivera · Jun 18, 2026 · 4 min read
Vox-Lumen offers three voice models. Lumen Core is built for high-volume outreach. Plus balances richness and cost. Ultra delivers the closest-to-human nuance for brand-critical moments.
A simple decision frame
Use Core for reminders and status updates. Use Plus for mixed inbound/outbound teams. Use Ultra when voice is part of your brand experience — luxury hospitality, executive outreach, or high-touch support.
You can switch later
Plans let you change models as needs evolve. Start where the economics work, then upgrade the agents that convert best.