Use llama.cpp from 4D

Abstract

llama.cpp is an open-source project that allows you to run Meta’s LLaMA language models locally on CPUs without heavy frameworks like PyTorch or TensorFlow. Essentially, it’s a lightweight C++ implementation optimized for inference.

Usage

Instantiate cs.llama.llama in your On Startup database method:

var $llama : cs.llama.llama

If (False)
    $llama:=cs.llama.llama.new()  //default
Else 
    var $homeFolder : 4D.Folder
    $homeFolder:=Folder(fk home folder).folder(".llama-cpp")
    var $file : 4D.File
    var $URL : Text
    var $port : Integer
    
    var $event : cs.event.event
    $event:=cs.event.event.new()
    /*
        Function onError($params : Object; $error : cs.event.error)
        Function onSuccess($params : Object; $models : cs.event.models)
        Function onData($request : 4D.HTTPRequest; $event : Object)
        Function onResponse($request : 4D.HTTPRequest; $event : Object)
        Function onTerminate($worker : 4D.SystemWorker; $params : Object)
    */
    
    $event.onError:=Formula(ALERT($2.message))
    $event.onSuccess:=Formula(ALERT($2.models.extract("name").join(",")+" loaded!"))
    $event.onData:=Formula(LOG EVENT(Into 4D debug message; "download:"+String((This.range.end/This.range.length)*100; "###.00%")))
    $event.onResponse:=Formula(LOG EVENT(Into 4D debug message; "download complete"))
    $event.onTerminate:=Formula(LOG EVENT(Into 4D debug message; (["process"; $1.pid; "terminated!"].join(" "))))
    
    /*
        embeddings
    */
    
    $file:=$homeFolder.file("nomic-embed-text-v1.Q8_0.gguf")
    $URL:="https://huggingface.co/nomic-ai/nomic-embed-text-v1-GGUF/resolve/main/nomic-embed-text-v1.Q8_0.gguf"
    $port:=8082
    $llama:=cs.llama.llama.new($port; $file; $URL; {\
    ctx_size: 2048; \
    batch_size: 2048; \
    threads: 4; \
    threads_batch: 4; \
    threads_http: 4; \
    temp: 0.7; \
    top_k: 40; \
    top_p: 0.9; \
    log_disable: True; \
    repeat_penalty: 1.1; \
    n_gpu_layers: -1}; $event)
    
    /*
        chat completion (with images)
    */
    
    $file:=$homeFolder.file("Qwen2-VL-2B-Instruct-Q4_K_M")
    $URL:="https://huggingface.co/bartowski/Qwen2-VL-2B-Instruct-GGUF/resolve/main/Qwen2-VL-2B-Instruct-Q4_K_M.gguf"
    $port:=8083
    $llama:=cs.llama.llama.new($port; $file; $URL; {\
    ctx_size: 2048; \
    batch_size: 2048; \
    threads: 4; \
    threads_batch: 4; \
    threads_http: 4; \
    temp: 0.7; \
    top_k: 40; \
    top_p: 0.9; \
    log_disable: True; \
    repeat_penalty: 1.1; \
    n_gpu_layers: -1}; $event)
    
End if   

Unless the server is already running (in which case the costructor does nothing), the following procedure runs in the background:

1. The specified model is downloaded via HTTP
2. The llama-server program is started

Now you can test the server:

curl -X POST http://127.0.0.1:8080/v1/embeddings \
     -H "Content-Type: application/json" \
     -d '{"input":"The quick brown fox jumps over the lazy dog."}'

Or, use AI Kit:

var $AIClient : cs.AIKit.OpenAI
$AIClient:=cs.AIKit.OpenAI.new()
$AIClient.baseURL:="http://127.0.0.1:8080/v1"

var $text : Text
$text:="The quick brown fox jumps over the lazy dog."

var $responseEmbeddings : cs.AIKit.OpenAIEmbeddingsResult
$responseEmbeddings:=$AIClient.embeddings.create($text)

Finally to terminate the server:

var $llama : cs.llama.llama
$llama:=cs.llama.llama.new()
$llama.terminate()

Vision

llama-server supports OCR if you use a model converted to .gguf. Q4_K_M is generally considered a best level of quantisation for OCR.

Model	Parameters	Size
Llama-3.2-11B-Vision-Instruct.Q4_K_M.gguf	11B	5.96GB
MiniCPM-V-2_6-Q4_K_M.gguf	8B	4.68GB
Qwen2-VL-7B-Instruct-Q4_K_M.gguf	7B	4.68GB
Qwen2-VL-2B-Instruct-Q4_K_M.gguf	2B	986MB

llama-server does not support the /v1/files API so you need to reference the image via a data URI in your chat completion request.

AI Kit compatibility

The API is compatibile with Open AI.

Class	API	Availability
Models	/v1/models	✅
Chat	/v1/chat/completions	✅
Images	/v1/images/generations
Moderations	/v1/moderations
Embeddings	/v1/embeddings	✅
Files	/v1/files