Cactus Blog

Deep dives into on-device AI, inference optimization, and the engineering behind Cactus.

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ModelsResearch

Needle: We Distilled Gemini Tool Calling into a 26M Model

An open-source 26M parameter function-calling model that runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices.

HN

Henry Ndubuaku

||3 min read
ResearchQuantizationModels

TurboQuant-H: Hadamard Rotation for 2-Bit Embedding Quantization

A simplified offline variant of TurboQuant using Hadamard rotation and per-group Lloyd-Max codebooks — 4× compression of per-layer embeddings in Gemma 4 E2B at +0.06 PPL.

Karen Mosoyan & Henry Ndubuaku||12 min read
ModelsBenchmarks

LFM-2.5-350m on Cactus: 140 tok/sec, Single Core, 355 MB

Benchmarking Liquid's LFM-2.5-350m across seven devices with Cactus. INT8 quantization, single-core CPU decode, zero-copy loading, and why this configuration makes on-device inference practical.

Henry Ndubuaku||8 min read
TranscriptionHybrid AI

Sub-150ms Transcription with Cloud-Level Accuracy: Why We Built a Hybrid Engine

How Cactus combines on-device and cloud inference for real-time speech transcription with sub-150ms latency and automatic cloud handoff for noisy audio.

Roman Shemet||5 min read
TranscriptionModels

Ridiculously Fast On-Device Transcription: Reviewing Parakeet CTC 1.1B with Cactus

Review of NVIDIA's Parakeet-CTC-1.1B model running locally on Mac with Cactus. Architecture breakdown, benchmarks, and transcription use cases.

Satyajit Kumar & Henry Ndubuaku||12 min read
ModelsApplications

The Sweet Spot for Mac Code Use: Reviewing LFM2 24B MoE A2B with Cactus

Review of LiquidAI's LFM2-24B-A2B mixture-of-experts model running locally on Mac with Cactus. Architecture breakdown, benchmarks, and coding agent use cases.

Noah Cylich & Henry Ndubuaku||10 min read