CPU types

Use CPU workers for work that doesn’t need a GPU, such as preprocessing, routing, or lightweight APIs. Set the cpu parameter to an instance type ID:

import runpod

app = runpod.App("cpu-demo")

@app.queue(cpu="cpu3c-2-4")
def preprocess(data: dict):
    ...

@app.api(cpu="cpu3c-1-2")
class Router:
    @runpod.get("/health")
    async def health(self):
        return {"status": "ok"}

cpu and gpu are mutually exclusive. To set fallbacks, pass a list, for example cpu=["cpu3c-2-4", "cpu3g-2-8"]. The runpod.CpuInstanceType enum lists the same IDs if you prefer constants, for example runpod.CpuInstanceType.CPU3C_2_4.

Instance types

Instance IDs follow the pattern cpu{generation}{type}-{vCPU}-{memory GB}. The c types are compute-optimized and the g types are general purpose, with more memory per vCPU.

ID	vCPU	Memory	Type
`cpu3c-1-2`	1	2 GB	3rd gen, compute-optimized
`cpu3c-2-4`	2	4 GB	3rd gen, compute-optimized
`cpu3c-4-8`	4	8 GB	3rd gen, compute-optimized
`cpu3c-8-16`	8	16 GB	3rd gen, compute-optimized
`cpu3g-1-4`	1	4 GB	3rd gen, general purpose
`cpu3g-2-8`	2	8 GB	3rd gen, general purpose
`cpu3g-4-16`	4	16 GB	3rd gen, general purpose
`cpu3g-8-32`	8	32 GB	3rd gen, general purpose
`cpu5c-1-2`	1	2 GB	5th gen, compute-optimized
`cpu5c-2-4`	2	4 GB	5th gen, compute-optimized
`cpu5c-4-8`	4	8 GB	5th gen, compute-optimized
`cpu5c-8-16`	8	16 GB	5th gen, compute-optimized

Data center availability

CPU stock varies by generation:

3rd generation (cpu3c, cpu3g): EU-CZ-1, EU-RO-1, US-CA-2, US-IL-1, US-KS-2, US-MO-1, US-MO-2, US-NC-2, US-NE-1, and US-WA-1.
5th generation (cpu5c): EU-RO-1 only.

If you pin a CPU resource to a data center with datacenter, choose one that stocks the instance type. If the resource shares a network volume with other resources, every resource must be able to run in the volume’s data center.

Limitations

Global volumes require GPU compute, so CPU resources can only mount network volumes.
min_cuda_version has no effect on CPU resources, and setting it raises an error.
CPU workers get a 10 GB container disk by default. Change it with container_disk_gb.

Next steps

Choose GPUs for GPU workloads.
See every resource parameter.

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Instance types

Data center availability

Limitations

Next steps

​Instance types

​Data center availability

​Limitations

​Next steps

Instance types

Data center availability

Limitations

Next steps