Vendor
Meta
Parameters
1B
Size
2.3 GB
$ brew install mirai$ mirai --model meta-llama/Llama-3.2-1B-Instruct

Benchmarks

0.21 s

How long until the model starts responding

lower is better

181 t/s

The speed at which text appears on screen

higher is better

2.56 GB

RAM the model uses while running

lower is better

uzu0.5.14MLX0.31.2llama.cpp0.3.23/1,309 input tokens/512 output tokens

Benchmarked 7 Aug 2026

Integrate with SDK

1
Choose framework
2
Run the following command to install Mirai SDK
https://github.com/trymirai/uzu-swift
3
Apply code
1import Foundation2import Uzu34public func runChat() async throws {5    let engineConfig = EngineConfig.create()6    let engine = try await Engine.create(config: engineConfig)7    8    guard let model = try await engine.model(identifier: "alibaba:qwen3.5:0.8b:mirai:mirai-m:4") else {9        return10    }11    for try await update in try await engine.download(model: model).iterator() {12        print(String(format: "\r\u{001B}[2KDownload progress: %.2f%%", update.progress() * 100), terminator: "")13        fflush(stdout)14    }15    print()16    17    let messages = [18        ChatMessage.system().withText(text: "You are a helpful assistant"),19        ChatMessage.user().withText(text: "Tell me a short, funny story about a robot")20    ]21    let session = try await engine.chat(model: model, config: .create())22    let stream = await session.replyWithStream(input: messages, config: .create())23    var message: ChatMessage? = nil24    for try await update in stream.iterator() {25        switch update {26        case .replies(let replies):27            let reply = replies.last28            message = reply?.message29            print("Generated tokens: \(reply?.stats.tokensCountOutput ?? 0)")30        case .error(let error):31            print("Error: \(error)")32        }33    }34    print("Reasoning: \(message?.reasoning() ?? "empty")")35    print("Text: \(message?.text() ?? "empty")")36}37

Details

Llama 3.2 1B Instruct is a lightweight, instruction-tuned large language model from Meta, designed for multilingual dialogue, summarization, and agentic retrieval tasks. At just 1 billion parameters, it targets efficiency-first deployments — including mobile and edge devices — while still delivering competitive performance against larger open source and closed chat models on standard industry benchmarks.

Architecture & Training

The model is built on an optimized transformer architecture featuring grouped-query attention, which improves inference scalability and throughput. It was pretrained on up to 9 trillion tokens of publicly available data, with a knowledge cutoff of December 2023.

A key element of the training pipeline is knowledge distillation from Meta's larger Llama 3.1 models, allowing the 1B variant to punch above its weight class. Alignment was achieved through a combination of supervised fine-tuning, rejection sampling, and direct preference optimization (DPO).

Multilingual Support

Llama 3.2 1B Instruct officially supports eight languages: English, German, French, Italian, Portuguese, Hindi, Spanish, and Thai. The model was trained on a broader set of languages beyond these, though official support and evaluation focus on this core group.

Edge & Mobile Deployment

Quantized variants of the model are available, optimized via techniques such as SpinQuant and QLoRA. These deliver significant speedups and memory savings, making the 1B model a strong candidate for on-device inference in resource-constrained environments.

Intended Use

Meta positions Llama 3.2 1B Instruct for use within broader AI systems that include additional safety guardrails, rather than as a standalone deployment. It is released for both commercial and research applications, making it a versatile option for developers building conversational assistants, summarization pipelines, or tool-augmented agents at minimal computational cost.

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