What HY3 Is and How It Works

HY3 is a new AI model from the Chinese company Tencent. It is free to use and open source, meaning anyone can download and run it. Unlike many AI models built only to score well on tests, HY3 is designed to handle real work tasks like reading full websites, using tools, and completing multi-step jobs without forgetting steps.

HY3 has a total of 295 billion parameters, but it only activates 21 billion of them at any one time. This makes it faster and cheaper to run than a full-size model of that scale. One of its key features is a 256,000-token context window. That means it can read a whole book, a complete website, or a pile of SEO reports all at once and still remember the beginning by the time it reaches the end. For SEO work, this is very useful because you can hand it all your site content and it will stay on track.

Main Features That Set HY3 Apart

HY3 is different from most AI models because Tencent built it to work inside real tools like chat apps, documents, and coding software. It is good at using tools, following steps, and finishing tasks on its own. It can plan a job, do it in stages, and keep going without losing focus. This matters for SEO because good SEO work involves many steps: research, writing, checking, and publishing.

  • Coding ability: People testing HY3 say it is strong at building websites, fixing bugs, and working with databases. This is helpful for SEO teams who deal with code.
  • Cost efficiency: Because it only uses part of its full size at once, it costs less to run than a full-size model of the same scale. You do not need a huge computer setup to use it.
  • Better formatting and tool calls: HY3 was trained to handle formatting better and make stronger tool calls, meaning when it needs to search or pull data, it does it more reliably the first time.
  • Flexible deployment: You can run HY3 through VLLM, SGLang, OpenRooter, ModelScope, or set it up on your own hardware. This gives teams choices for how they use it.

How to Get Started With HY3

Getting started with HY3 is straightforward because it is free and open source. You can choose a method that matches your technical skills and hardware. Follow these steps to begin:

  1. Download the model: Go to platforms like ModelScope or Hugging Face to download HY3. The model files are available for free.
  2. Choose your runtime: Decide how you want to run HY3. Options include VLLM, SGLang, OpenRooter, or directly on your own server if you have the hardware.
  3. Set up the environment: Install the required software for your chosen runtime. For example, if using VLLM, follow its setup guide to install the dependencies.
  4. Load the model: Use the runtime to load HY3. This may involve a command line or a script depending on the platform you picked.
  5. Test with a small input: Start by giving HY3 a short text, like a paragraph from your website, to see how it handles the information. Check that it remembers details correctly.
  6. Scale up to full tasks: Once it works, feed it larger content, such as full SEO reports or your whole site structure, to make use of the 256,000-token context window.

How to Use HY3 for SEO: Workflows Shown

In this episode, several SEO workflows were demonstrated using HY3. These show how you can apply the model to real tasks. Here are the key workflows:

Workflow 1: Weekly SEO plan from notes. Give HY3 your business notes and meeting notes. Use a prompt like: 'You are an SEO advisor for my business. Read my notes and meeting notes below. Give me a simple weekly SEO plan to get more traffic and leads. Keep it short.' HY3 will return a clear to-do list.

Workflow 2: Full SEO campaign from data. Provide customer data, landing pages, and competitor sites. Prompt: 'You are an SEO content strategist. Look at this customer data, these landing pages, and these competitor sites. Build me an SEO campaign with blog topics, an email plan, and keyword targets.' HY3 returns a keyword list, blog outline, and email sequence.

Workflow 3: Turn a lecture into study tools. Feed HY3 an SEO lecture. Prompt: 'You are an SEO tutor. Read this lecture on SEO ranking factors. Turn it into short notes, five quiz questions, and simple flashcards. Keep it easy to understand.' HY3 creates notes, a quiz, and flashcards.

Workflow 4: Build a lesson plan for teaching. Use an SEO curriculum outline. Prompt: 'You are a course helper for an SEO teacher. Using this outline, make a lesson plan, one worksheet, one assignment, and a grading rubric on how backlinks and rankings work.' HY3 builds a full lesson pack.

Results and Tests From the Episode

The episode shared several test numbers for HY3. In one human test, HY3 scored 2.67 compared to another model called GLM which scored 2.51. Its error rate in longer chats dropped from 17.4% down to 7.9%. On a memory test called MRCR, its score jumped from 42.9% up to 75.1%.

These numbers show that HY3 is better at staying on track during longer tasks. This matters for SEO because SEO work is never just one message. It involves research, drafts, edits, checking links, publishing, and tracking results. If an AI forgets steps, it creates more work for you. HY3's lower error rate and higher memory score mean it can handle these multi-step tasks more reliably.

Tips, Limits, and Mistakes to Avoid

When using HY3 for SEO, keep these tips and limits in mind. First, remember that HY3 works best as the engine behind your systems, not just as a chatbot you talk to once. Use it to automate multi-step workflows rather than one-off questions.

A common mistake is not taking advantage of the large context window. If you give HY3 only short snippets, you miss out on its ability to see the full picture. Feed it entire websites or long reports to get the best results. Also, be aware that HY3 is a free tool, so you may need to set it up yourself if you want full control. Use the flexible deployment options like VLLM or SGLang to match your setup.

Finally, note that HY3's strength is in reliability and tool use, not flashy demos. For building automations, its consistent performance matters more than a quick demo. Test it with your own data before relying on it for client work.

Who HY3 Is For and Why It Matters

HY3 is for anyone doing SEO or running an online business. It is built for entrepreneurs, marketers, agencies, students, and teachers who want real, usable AI workflows. Because it is free and open source, it gives small teams and individuals access to a powerful model without high costs.

Why it matters: SEO work involves many steps, and most AI models forget information as tasks get longer. HY3's large context window and low error rate keep it on track, saving you time and rework. Its ability to use tools and follow multi-step plans means you can automate research, writing, and publishing. For anyone building their own SEO tools or workflows, HY3's flexibility and reliability are a big win.