Serverless GPU inference
Ion
Cumulus's serving network for open frontier models. Checkpoint-restored cold starts bring large models up in seconds, behind one OpenAI-compatible endpoint that scales with demand.
Book a DemoCold starts in seconds
GPU checkpoint-and-restore loads models 3.4× faster than standard loaders today, with sub-2-second 70B-class starts as the engineering target.
Open frontier models
Kimi, GLM, Qwen3, MiniMax, DeepSeek — served on Cumulus GPUs behind one OpenAI-compatible API.
Demand-based capacity
A priority-queue scheduler adds GPUs when contention rises, so bursty traffic never pays for a standing fleet.
Detailed use cases for Ion are coming soon. If you want the specifics for your workload now, book a demo — we'll walk through it live.