FlashInfer

FlashInfer

3.0

Toolkit of acceleration techniques for large language model deployment and serving.

Last Updated Nov 10, 2026
FlashInfer screenshot

About

FlashInfer is an open toolkit that introduces techniques for accelerating large language model deployment. It provides optimized kernels and runtime solutions for LLM inference and serving — the layer where attention, sampling, and memory movement determine how fast and how cheaply a model can serve users. FlashInfer is aimed at engineers who deploy LLMs and need better throughput and latency than stock inference stacks provide.

Key Features

**Inference acceleration kernels: ** optimized implementations of core LLM operations, including attention, for faster decoding.
**Serving-focused design: ** techniques target real serving scenarios — batching, shared prefixes, and variable-length workloads.
**Integration-friendly: ** built to slot into existing inference frameworks rather than replace them.
**Research-to-production transfer: ** brings published acceleration techniques into a usable library.
**Open toolkit: ** available to the community for deployment and further research.

Pricing & Fees

  • Pricing: Not publicly listed on the pages we reviewed; check the official site for current plans.
  • Open source: FlashInfer is distributed as open-source kernels for LLM inference, with code available on GitHub under the flashinfer-ai organization.
  • Platform availability: The project targets GPU-based deployment of large language models and provides documentation, papers, and release posts on its official site.

Who It's For

FlashInfer is for ML infrastructure engineers running LLM inference at scale, framework developers building serving systems, and researchers who need fast, reproducible kernels for attention and decoding experiments.

FAQ

What is FlashInfer for?Accelerating LLM inference and serving through optimized kernels and runtime techniques.

Do I have to replace my inference stack?No — it is designed to integrate with existing serving frameworks.

Is it open?Yes — it is an open toolkit for deployment and research.