aicoolies logo
PrismML Bonsai logo
PrismML Bonsai logo

PrismML Bonsai

First commercially viable 1-bit LLMs that are 14x smaller and 8x faster

open sourceupdated Apr 21, 2026

PrismML Bonsai delivers the first commercially viable 1-bit large language models with 8B, 4B, and 1.7B parameter variants. The 8B model runs in just 1GB of RAM versus 16GB for standard FP16 models, achieving 44 tokens per second on iPhone. Backed by $16.25M from Khosla Ventures and released under Apache 2.0, Bonsai makes capable LLMs practical for edge devices and resource-constrained environments.

PrismML emerged from stealth in March 2026 with Bonsai, a family of 1-bit language models that achieve dramatic efficiency gains without proportional quality loss. The 8B parameter model requires only 1GB of memory compared to 16GB for a standard FP16 Llama 3 8B, representing a 14x reduction in model size. Inference runs at 44 tokens per second on an iPhone and scales even faster on desktop hardware. This efficiency breakthrough makes capable language models practical for mobile devices, IoT endpoints, and any environment where compute and memory are constrained.

The technical approach uses a novel 1-bit quantization architecture with FP16 scale factors applied every 128 bits. PrismML provides custom forks of llama.cpp and MLX optimized for 1-bit inference, along with demo code, Colab notebooks, and developer integration documentation. The models are available on HuggingFace under the Apache 2.0 license. AnythingLLM integrated Bonsai models on launch day, demonstrating immediate ecosystem adoption and compatibility with existing local LLM infrastructure.

With $16.25M in funding from Khosla Ventures, Cerberus, and Google, PrismML has the backing to develop the 1-bit quantization toolchain into a comprehensive platform. The Bonsai 8B, 4B, and 1.7B models provide different capability-efficiency tradeoffs for various deployment scenarios. The 355-point Hacker News Show HN launch and positive reception on r/LocalLLaMA confirm strong community interest in edge-efficient LLMs. For developers building on-device AI experiences, Bonsai represents the most practical path to running capable models without cloud dependencies.

Pricing

Models free (Apache 2.0); company VC-funded, tooling may commercialize

Platforms

Custom llama.cpp/MLX forks; HuggingFace; runs on iPhone, desktop, edge

Categories

Tags

Use Cases

Related Tools

computed discovery: shared active categories · kept separate from editor-verified Alternatives

KTransformers parent kvcache-ai logo

KTransformers

Heterogeneous CPU-GPU inference and SFT for large MoE models

Open-source framework for running and fine-tuning large Mixture-of-Experts models with heterogeneous CPU-GPU execution, optimized kernels, limited VRAM and SGLang or LLaMA-Factory integrations.

Open Source
vLLM Production Stack parent vLLM logo

vLLM Production Stack

Official Kubernetes and Helm reference stack built on the vLLM inference engine

Official vLLM reference implementation for scaling the existing inference engine on Kubernetes with Helm, request routing, KV-cache offload, autoscaling and Prometheus/Grafana observability.

Open Source
Dynamo logo

NVIDIA Dynamo

Distributed inference orchestration above vLLM, SGLang and TensorRT-LLM

Open-source, datacenter-scale orchestration layer that coordinates vLLM, SGLang and TensorRT-LLM across nodes with disaggregated serving, KV-aware routing, multi-tier cache management and automatic scaling.

Open Source
GPUStack logo

GPUStack

Open-source GPU control plane for scalable AI model serving

Open-source GPU cluster manager that configures vLLM, SGLang, TensorRT-LLM or custom engines, serves models through compatible APIs, and provisions SSH-accessible GPU instances across on-premises, Kubernetes and cloud environments.

Open Source
Mooncake logo

Mooncake

Disaggregated KV cache storage and transfer for LLM serving

Open-source infrastructure for disaggregated LLM serving that pools KV caches across prefill and decode workers, with high-performance transfer, distributed storage and integrations for vLLM and SGLang.

Open Source
LMCache logo

LMCache

Reusable KV cache infrastructure for scalable LLM inference

Open-source KV cache management layer that persists, offloads and reuses model key-value caches across requests and serving engines to reduce repeated prefill work and improve inference throughput.

Open Source

Comparisons

FAQ

What is PrismML Bonsai?

PrismML Bonsai delivers the first commercially viable 1-bit large language models with 8B, 4B, and 1.7B parameter variants. The 8B model runs in just 1GB of RAM versus 16GB for standard FP16 models, achieving 44 tokens per second on iPhone. Backed by $16.25M from Khosla Ventures and released under Apache 2.0, Bonsai makes capable LLMs practical for edge devices and resource-constrained environments.

Is PrismML Bonsai free?

Yes — PrismML Bonsai is open source and free to use. Models free (Apache 2.0); company VC-funded, tooling may commercialize

Is PrismML Bonsai open source?

Yes — PrismML Bonsai is open source.

What are the best PrismML Bonsai alternatives?

The top editor-verified PrismML Bonsai alternatives are MLC LLM, ExecuTorch, Llamafile.