技术规格

系统要求

不同量化方法和上下文大小的显存要求

Llama 3.2 3B

Llama 3.2 3B is a compact, instruction-tuned, and text-only generative language model developed by Meta. It is part of the Llama 3.2 model family, which also includes 1 billion parameter text models and larger multimodal variants. The model is specifically designed for efficient deployment in resource-constrained environments, such as edge and mobile devices. Its primary purpose is to facilitate scalable assistant and agentic language technologies by offering capabilities for tasks such as summarization, instruction following, rewriting, and knowledge retrieval. The model supports multilingual interactions, with official support for eight languages including English, German, French, Italian, Portuguese, Hindi, Spanish, and Thai.

The architectural foundation of Llama 3.2 3B is an auto-regressive transformer. Key innovations include the adoption of Grouped-Query Attention (GQA) to enhance inference scalability, a technique that improves throughput without a proportional increase in hardware demands. Training involved knowledge distillation from larger Llama variants, specifically Llama 3.1 8B and 70B models, where their output logits served as token-level targets during pre-training to recover performance after pruning. Post-training alignment, particularly for instruction-tuned versions, utilizes supervised fine-tuning (SFT) and reinforcement learning with human feedback (RLHF). Furthermore, the model incorporates advanced quantization techniques, employing 4-bit groupwise quantization for transformer block weights and 8-bit per-token dynamic quantization for activations, optimizing its operation for environments like PyTorch's ExecuTorch framework.

Llama 3.2 3B is engineered for robust performance in on-device scenarios, balancing computational efficiency with output quality. It features an extended context window of 128,000 tokens, enabling processing of longer inputs for tasks such as document summarization and extended conversations. While the full precision models support this context length, quantized versions are typically configured for an 8,000-token context. The model's design prioritizes low-latency inferencing, making it suitable for applications that require rapid responses and operate with limited computational resources, such as mobile AI-powered writing assistants and customer service applications. The pre-trained variants also provide a foundational basis for further fine-tuning across various natural language generation tasks.