Intern Large Models

Intern Large Models is a web-based chat interface that gives you direct access to Intern's family of open-source large language models (InternLM) and multimodal models (InternVL). Instead of signing up for a separate service or running models locally, you can pick from several model variants — like Intern-S2-Preview, Intern-S1-MO, and InternThinker — each tuned for different tasks. The interface is simple: type a question, select a model, and get a response. It's essentially a hosted playground for Intern's AI models, designed for both quick experiments and serious work.

The chat UI is clean and familiar. On the left sidebar you can start a new chat, browse history, and switch between models. A notable feature is DeepThink mode, which prompts the model to reason step-by-step before answering — useful for math, logic, and programming problems. Intern-S1-MO is specifically built for long-thinking math reasoning and can tackle IMO-level challenges. InternThinker handles complex reasoning across mathematics, programming, logic, and even board games like Go. The platform also provides API access (separate from the chat interface) for developers who want to integrate these models into their own tools. Everything is free to use, though you may need to log in for persistent history.

This tool is most useful for developers, researchers, and students who need a no-hassle way to test or use Intern's open-source models. If you're working on a research paper that requires advanced mathematical reasoning, want to debug code with a model that explains its thinking, or need to classify images with a multimodal model, Intern Large Models gives you a direct line to those capabilities. It's also a good starting point if you're curious about open-source AI and want to see what Intern's models can do before deploying them yourself.