Magnitude

Magnitude is an inference engine for agents that compiles and tunes kernels on local hardware to accelerate the performance of open-weight models.

Magnitude is an inference engine designed to execute open-weight AI models locally on consumer and server hardware. It automatically compiles and tunes kernels specifically for the user's processor, whether Apple Silicon or NVIDIA GPUs, prior to model execution. This process results in faster decoding speeds compared to llama.cpp, reaching up to 92% faster performance on Metal. The engine manages memory dynamically, freeing resources when agent sessions conclude, and utilizes shared prefix caches to maintain speed during concurrent agent sessions. It supports various agent architectures including Pi, OpenCode, Hermes, and Codex. The software is open source under the Apache 2.0 license and operates entirely on the local machine.

Magnitude at a glance

Best for: Software engineer, Researcher
Runs on: macOS, Linux, open source
Pricing: Free, open source
Released: June 2026
Category: AI coding tool
Website: magnitude.dev

Key features

On-device kernel tuning for specific hardware
Support for popular open-weight model families
Dynamic memory management for active agents
Shared prefix caching for concurrent sessions
Local execution with no external token costs
Apache 2.0 open source license
Optimized performance on Metal and CUDA architectures

Use it for

Running local AI agents on personal workstations
Deploying open-weight models with hardware acceleration
Managing multiple concurrent agent sessions locally
Optimizing model inference for specific GPU hardware

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