What does 99.9% uptime mean for inference?

Together AI · 1 day ago

Together AI explains what different uptime tiers (99%, 99.9%, 99.99%) actually require for AI inference services, mapping each to specific failure domains and architectural requirements. 99% requires node-level redundancy within a data center, 99.9% requires full data center failover with live traffic routing to both facilities, and 99.99% requires multi-region deployment with reserved failover capacity. Infrastructure ownership, continuous failover testing, and end-to-end observability determine whether providers can actually deliver their SLA claims when failures occur.