LLM InfrastructureOpen Source✦ Free Tier

vLLM

High-throughput LLM serving with PagedAttention

32,000 stars● Health 90/100 — Active· commit recency (40 pts) · star momentum (30 pts) · issue ratio (20 pts) · forks (10 pts)Dev Productivity & App Infrastructure

About

Production-grade LLM inference server. PagedAttention enables high throughput and efficient KV cache memory management.

Choose vLLM when…

  • You're serving LLMs at high throughput in production
  • Continuous batching and PagedAttention are needed
  • You're running your own GPU inference cluster

Builder Slot

Where do your models actually run?Required for most stacks

LLM providers and inference servers — where the actual model computation happens

Dev Tools
Not applicable
App Infra
Required
Hybrid
Required

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Stack Genome Detection

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Integrates with (10)

LiteLLMLLM Infrastructure

LiteLLM connects to a self-hosted vLLM endpoint via its OpenAI-compatible API, treating it as any other provider.

Self-hosted GPU inference via vLLM accessible through the same LiteLLM interface as cloud providers — one config for everything.

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LlamaIndexPipelines & RAG

LlamaIndex connects to a vLLM-hosted endpoint via its OpenAI-compatible API, treating self-hosted vLLM as a generation provider.

LlamaIndex RAG pipelines backed by self-hosted GPU inference — enterprise-grade retrieval and generation with full data residency.

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RunPodLLM Infrastructure

vLLM runs on RunPod GPU pods as a Docker container, exposing an OpenAI-compatible inference endpoint.

Self-hosted high-throughput LLM inference on rented GPUs — cheaper than managed APIs at scale.

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AxolotlFine-tuning

Axolotl-fine-tuned models are saved in HuggingFace format and loaded directly by vLLM for serving.

Complete OSS fine-tuning-to-production pipeline: train with Axolotl, serve with vLLM.

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UnslothFine-tuning

Unsloth exports fine-tuned models in GGUF or HuggingFace format, both of which vLLM serves natively.

Train fast with Unsloth, serve fast with vLLM — same model file, no conversion required.

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LlamaFactoryFine-tuning

LlamaFactory outputs HuggingFace-compatible checkpoints that vLLM loads directly for production serving.

Full fine-tuning workflow from dataset to vLLM deployment within one cohesive ecosystem.

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TorchtuneFine-tuning

Torchtune exports fine-tuned weights as HuggingFace safetensors, compatible with vLLM loaders.

PyTorch-native fine-tuning with the same vLLM deployment path as the broader HuggingFace ecosystem.

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PredibaseFine-tuning

Predibase LoRA adapters can be exported and served via vLLM multi-LoRA serving mode.

Swap fine-tuned adapters at inference time without model reload overhead using vLLM.

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Qwen-VLMultimodal

vLLM supports Qwen-VL as a multi-modal model, serving vision and language requests via OpenAI API.

Production-grade multimodal serving for Qwen-VL with continuous batching and high throughput.

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InternVL2Multimodal

vLLM multi-modal pipeline supports InternVL2, enabling batched vision-language inference at scale.

High-throughput InternVL2 serving with the same OpenAI-compatible API used for text models.

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Often paired with (1)

Alternatives to consider (2)

Pricing

✦ Free tier available

Recent Activity

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In 2 stacks

Ruled out by 3 stacks

Indie Hacker / Startup Stack
GPU ops are a full-time job you don't have
Edge / On-Device AI Stack
High-throughput server inference framework — requires GPU server infrastructure
Solo PM Product Stack
GPU ops are a full-time job a solo PM does not have

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