I have compared many gpu instances personally & listed them 👇 (all pricing are for dedicated gpus & standard A6000 48gb vram),
Linode: good response time but are very expensive >1$/hr
Runpod: my personal favourite & recommended, an all-rounder at ~.59$/hr
AWS: not beginners friendly, very expensive>1$/hr
Hetzner: not recommended, pricing around 1.16$/hr (>1$/hr)
LeaderGpu: I read somewhere around 1.11$/hr pricing
CudoCompute: Cheapest pricing of .45$/hr & clean docs