Qwen2.5-1.5B-Instruct is a 1.5 billion parameter instruction-tuned language model hosted on Hugging Face. It forms part of the Qwen2.5 series and is made available as an open model for text-based tasks.
The model includes a specific chat template that defines how it processes conversation history. When the first message is a system prompt it incorporates that content directly; otherwise it defaults to the instruction "You are Qwen, created by Alibaba Cloud. You are a helpful assistant." The template further supports tool use by inserting function signatures inside XML-style <tools> tags and instructing the model to emit calls inside <tool_call> tags containing JSON objects with name and arguments fields. This structure enables the model to handle multi-turn dialogues that may involve external function invocation.
It is delivered as a downloadable model repository on the Hugging Face platform, allowing integration into applications that support the Transformers library or compatible inference runtimes. The page presents the model under the organization's open-source efforts, consistent with Hugging Face's focus on open models and open science.
Qwen2.5 1.5B Instruct is a Foundation models & chat product. Allowing developers to use and fine-tune an instruction-following language model for various text generation tasks. It is built as an open-source project for AI researchers and developers. Qwen2.5 1.5B Instruct is open source under the Open Source license. Qwen2.5 1.5B Instruct is available on the web, the command line, and API, and it can be self-hosted.
Behind Qwen2.5 1.5B Instruct is Qwen, and the product first shipped in 2024. Development happens publicly on GitHub with 27.4k stars. The category is crowded — PulseGate's index counts 25 comparable apps. Key capabilities include instruction following, text generation, and open weights.
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