Saturday, June 21, 2025

MiniCPM4: The Fastest LLM

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Introduction to MiniCPM-4

While every other tech company is betting on better results and accuracy from LLMs, MiniCPM has been the go-to model for fastest inference on any device, especially Edge AI. And now they have introduced a new series of MiniCPM models that is MiniCPM4 which looks to be the fastest LLM ever.

What is MiniCPM-4?

MiniCPM-4 is an ultra-efficient open-source LLM series built to run fast and lean, especially on end-side (edge) devices like mobile chips or embedded boards. Think Raspberry Pi dreams with LLaMA3-like brains. You get two major sizes: MiniCPM4–0.5B — 500M parameters for low-footprint devices, and MiniCPM4–8B — A full-featured 8B model with state-of-the-art performance.

Key Features of MiniCPM-4

Some other variants are also released alongside a BitNet like model, i.e., BitCPM4. MiniCPM-4 builds on the Transformer architecture but takes it to the next level with several innovative features.

1. InfLLM v2 (Sparse Attention)

Instead of looking at all tokens (dense attention), MiniCPM learns to only look at the most relevant parts. This means fewer calculations = much faster inference, especially for long inputs (up to 128K tokens!). It handles both prefilling and decoding acceleration, unlike many sparse models that fail at generation.

2. UltraClean Data

Instead of just feeding the model random web data, MiniCPM uses a smart filtering system called UltraClean to train on only high-quality, knowledge-dense, and reasoning-intensive content. The result? Fewer tokens needed, but better output.

3. ModelTunnel v2

Think of this as a hyperparameter optimization lab. It runs thousands of experiments on small models to discover the best way to train big ones efficiently. Result: MiniCPM-4 gets top-tier performance with less training cost.

4. BitCPM4 (Ternary Weights)

When memory is tight, BitCPM comes to the rescue. It trains a version of MiniCPM where weights are limited to just -1, 0, or 1. This allows it to run on extremely constrained hardware without falling apart in performance.

Conclusion

In conclusion, MiniCPM-4 is a revolutionary LLM series that offers unparalleled speed and efficiency on edge devices. With its innovative features such as InfLLM v2, UltraClean Data, ModelTunnel v2, and BitCPM4, it is poised to take the AI world by storm. Whether you’re working on a Raspberry Pi or a high-end mobile device, MiniCPM-4 is the perfect choice for anyone looking to harness the power of LLMs without compromising on performance.

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