Spark X2.5 4B

Spark X2.5 4B is a text-generation model from the repository XHToken/Spark-X2.5-4B, licensed under apache-2.0 and compatible with the Hugging Face Transformers format. The model card describes it as a compact, general-purpose language model that uses a hybrid attention architecture (one full-attention layer and three sliding-window attention layers) and natively supports context windows up to 1M tokens. It is presented as supporting conversation, writing, translation, reasoning, coding, tool use, and agentic workflows, with broad language coverage and compatibility with several inference frameworks and platforms. The model was trained on Huawei Ascend clusters using large-scale reinforcement learning and post-training techniques. No specific performance numbers or hardware requirements are stated in the provided source.