ppmlx 0.5.1

CLI for running LLMs on Apple Silicon via MLX

ppmlx

Run LLMs on your Mac. OpenAI-compatible API powered by Apple Silicon.

Install

uv tool install ppmlx

Requires macOS on Apple Silicon (M1+) and Python 3.11+

Privacy note: ppmlx never sends prompts, responses, file contents, paths, or tokens anywhere. Optional anonymous usage analytics can be disabled with ppmlx config --no-analytics.

Get Started

ppmlx pull qwen3.5:9b      # download a model
ppmlx run qwen3.5:9b       # chat in the terminal
ppmlx serve                 # start API server on :6767

curl | sh (one-liner)

curl -fsSL https://raw.githubusercontent.com/the-focus-company/ppmlx/main/scripts/install.sh | sh

From source

git clone https://github.com/the-focus-company/ppmlx
cd ppmlx
uv tool install .

Homebrew

Homebrew tap coming soon. For now, use uv tool install ppmlx.

---

Quick Start

# 1. Download a model
ppmlx pull llama3

# 2. Interactive chat REPL
ppmlx run llama3

# 3. Start OpenAI-compatible API server on :6767
ppmlx serve

---

Benchmarks

Measured on a MacBook Pro M4 Pro (48 GB unified memory, macOS 15.x). Each scenario was run 3 times with temperature=0 and max_tokens=8192; values below are averages.

GLM-4.7-Flash (4-bit, ~5 GB)

Scenario	Metric	ppmlx	Ollama	Delta
Simple (short prompt, short answer)	tok/s	63.1	40.5	+56%
	TTFT	374 ms	832 ms	-55%
Complex (short prompt, long answer)	tok/s	55.6	38.8	+43%
	TTFT	496 ms	412 ms	+20%
Long context (~4 K token prompt)	tok/s	42.1	27.5	+53%
	TTFT	6,792 ms	8,401 ms	-19%

Qwen 3.5 9B (4-bit, ~6 GB)

Scenario	Metric	ppmlx	Ollama	Delta
Simple	tok/s	48.2	22.7	+112%
	TTFT	537 ms	324 ms	+66%
Complex	tok/s	47.2	23.0	+106%
	TTFT	567 ms	455 ms	+25%
Long context	tok/s	43.2	23.7	+82%
	TTFT	9,212 ms	11,461 ms	-20%

tok/s = tokens per second (higher is better). TTFT = time to first token (lower is better). Delta is relative to Ollama.

Methodology. Streaming chat completions over the OpenAI-compatible API; TTFT measured from request start to first SSE content chunk. See scripts/bench_common.sh and the per-model scripts in scripts/ for the full, reproducible setup.

That's it. Any OpenAI-compatible tool works out of the box:

from openai import OpenAI

client = OpenAI(base_url="http://localhost:6767/v1", api_key="local")
response = client.chat.completions.create(
    model="qwen3.5:9b",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Commands

Command	Description	Key Options
ppmlx launch	Interactive launcher (pick action + model)	-m model, --host, --port, --flush
ppmlx serve	Start API server on :6767	-m model, --embed-model, -i, --no-cors
ppmlx run <model>	Interactive chat REPL	-s system, -t temp, --max-tokens
ppmlx pull [model]	Download model (multiselect if no arg)	--token
ppmlx list	Show downloaded models	-a all (incl. registry), --path
ppmlx rm <model>	Remove a model	-f skip confirmation
ppmlx ps	Show loaded models & memory
ppmlx quantize <model>	Convert & quantize HF model to MLX	-b bits, --group-size, -o output
ppmlx config	View/set configuration	--hf-token

Connect Your Tools

Point any OpenAI-compatible client at http://localhost:6767/v1 with any API key:

• Cursor — Settings > AI > OpenAI-compatible
• Continue — config.json: provider openai, apiBase above
• LangChain / LlamaIndex — set base_url and api_key="local"

Config

Optional. ~/.ppmlx/config.toml:

[server]
host = "127.0.0.1"
port = 6767

[defaults]
temperature = 0.7
max_tokens = 2048

[analytics]
enabled = true
provider = "posthog"
respect_do_not_track = true

Anonymous Usage Analytics

ppmlx supports privacy-preserving anonymous product analytics, disabled by default. On first interactive run, the beta onboarding asks whether you want to help by enabling it.

What is sent:

• command and API event names such as serve_started, model_pulled, api_chat_completions
• app version, Python minor version, OS family, CPU architecture
• a random anonymous install id, used only to count returning beta installs
• coarse booleans/counters such as stream=true, tools=true, batch_size=4

What is never sent:

• prompts, responses, tool arguments, file contents, file paths
• HuggingFace tokens, API keys, repo IDs, model prompts, request bodies

When events are sent:

• when a CLI command starts
• when OpenAI-compatible API endpoints are hit

Why:

• understand which workflows matter most during beta
• prioritize compatibility work across commands and API surfaces
• measure adoption without collecting user content

Opt out:

ppmlx config --no-analytics

or:

[analytics]
enabled = false

By default, opted-in beta analytics are sent to the maintainer-operated PostHog project. To use your own PostHog sink instead, configure:

export PPMLX_ANALYTICS_HOST="https://analytics.example.com"
export PPMLX_ANALYTICS_PROJECT_API_KEY="your-posthog-project-api-key"

If you prefer, you can also set the same values in ~/.ppmlx/config.toml.

API Documentation

When the server is running, interactive API docs are available at:

• Swagger UI: http://localhost:6767/docs
• ReDoc: http://localhost:6767/redoc

Requirements

• macOS on Apple Silicon (M1 or later)
• Python 3.11+
• At least 8 GB unified memory (16 GB+ recommended for larger models)

ppmlx vs Ollama

	ppmlx	Ollama
Runtime	MLX (Apple-native)	llama.cpp (cross-platform)
Platform	macOS Apple Silicon only	macOS, Linux, Windows
GPU backend	Metal (unified memory)	Metal / CUDA / ROCm
API	OpenAI-compatible	Ollama + OpenAI-compatible
Language	Python	Go + C++
Quantization	MLX format	GGUF format

Choose ppmlx if you want maximum Apple Silicon performance with a pure-Python, MLX-native stack. Choose Ollama if you need cross-platform support or GGUF models.

License

MIT