Developed by the InternLM team, the InternLM3-8B-Instruct is a large language model featuring exceptional reasoning capabilities and proficiency in knowledge-intensive tasks. Despite being trained with only 40 trillion high-quality tokens, it achieves over 75% lower training costs than similar models, while outperforming models such as Llama3.1-8B and Qwen2.5-7B on multiple benchmark tests. It supports deep reasoning modes that tackle complex inference tasks, while also offering smooth user interaction capabilities. The model is open-sourced under the Apache-2.0 license, making it suitable for various applications needing efficient reasoning and knowledge processing.