6Block

6block is a compute provider that runs GPU clusters for people building artificial intelligence. Its aim is that clients can train, serve, fine-tune and localise models without first becoming an infrastructure company. It has operated since 2019 and earlier worked in blockchain mining.

What 6block offers

• AI training — multi-node GPU capacity with fast interconnect for long distributed training runs.
• AI inference — serving capacity behind an OpenAI-compatible endpoint, using vLLM, SGLang or TensorRT-LLM.
• Fine-tuning — LoRA, QLoRA and full-parameter tuning, followed by quantisation and evaluation.
• On-premise deployment — localised set-ups for teams whose data cannot leave their own site, including non-NVIDIA accelerators.
• Model releases — quantised models and checkpoints published from its own clusters.

Who it works with

AI teams that want managed infrastructure and an operations team rather than raw hardware.

Key facts

• Operating since: 2019.
• Hardware: NVIDIA, AMD, Ascend, Hygon and MThreads accelerators.
• Software: Kubernetes and bare-metal options.