OpenAI recently released gpt-oss, a small open-weight language model, sparking excitement in the AI community. It’s lean, immediately approachable, and lightweight, better for writing, coding, secure offline chatting, etc.
NativeMind now supports gpt-oss as one of its integrated local AI models. In this article, you'll learn how to use gpt-oss in NativeMind (with setup steps included) and the frequently asked questions you may have.
What is gpt-oss
gpt-oss is an open-weight language model released by OpenAI in August 2025. It’s designed to be:
- Lightweight – runs on consumer hardware
- Open – permissively licensed
Model details of gpt-oss
According to OpenAI, you have two options of gpt-oss models currently: gpt-oss:20b and gpt-oss:120b. Here are some differences between them, and you can choose one according to your needs.
Benefits of Running gpt-oss Locally
gpt-oss is OpenAI’s first general-purpose language model released with open weights and an Apache 2.0 license, allowing full commercial use and local deployment.
Unlike o3-mini or o4-mini, which are closed and API-only, gpt-oss can be run entirely on your own device or infrastructure—giving you full control over cost, latency, and data privacy.
The larger variant, gpt-oss-120b, uses a Mixture-of-Experts architecture to deliver strong reasoning performance with optimized efficiency. According to OpenAI, its performance is comparable to o4-mini, making it one of the most powerful open-weight models available today.
And for gpt-oss-20b, it’s comparable to o3-mini, which means that you can have an “offline ChatGPT” if you run it via NativeMind!
How to Set up gpt-oss in NativeMind
NativeMind, your private, open-weight, on-device AI assistant, now supports gpt-oss and other local LLMs like Deepseek, Qwen, Llama, Gemma, Mistral, etc. It’s very easy to set gpt-oss by connecting to Ollama, read the simple guide below.
Step 1: Setup Ollama in NativeMind
- Download and install NativeMind into your browser.
- Follow the simple guide to set up Ollama on your device. Tips: You can skip this step if you have already set up NativeMind correctly on your device.
Step 2: Download gpt-oss via Ollama
- Move to Ollama and find the gpt-oss model.
- Choose the size you want and click Use in NativeMind option to download.
Step 3: Run gpt-oss in NativeMind
- Open NativeMind in your browser, and now you can find the gpt-oss model.
- Select gpt-oss as your current model, and start using it smoothly.
FAQ about Using gpt-oss in NativeMind
1. Can I run gpt-oss without a GPU?
Yes. The smaller model gpt-oss:20b can run on a modern CPU with around 16GB RAM, though having a GPU will improve performance. The gpt-oss:120b variant generally requires a high-end GPU or server hardware.
2. Is gpt-oss free to use?
Yes. You can use gpt-oss totally free in NativeMind.
3. What can I use gpt-oss for?
You can use it for writing, summarizing, translating, coding, Q&A, and long-document analysis. With NativeMind, all of this can run fully offline, keeping your data private.
4. Which version should I choose: 20B or 120B?
Choose 20B if you want fast, lightweight local AI on standard hardware.
Choose 120B if you have the hardware and need maximum reasoning power for complex tasks.
Try It Now
After reading the setup guide above, you may have a general idea of gpt-oss and how to use it in NativeMind. Try it now to have a quick experience on using gpt-oss to summarize web page content, translate multiple languages, chat on context, and even write blog posts, emails, or notes—without any data sending to the cloud.
👉 Install NativeMind: https://github.com/NativeMindBrowser/NativeMindExtension
📁 Setup gpt-oss in Ollama: https://ollama.com/library/gpt-oss
💬 Start chatting locally with NativeMind today—no cloud, no API key, no limits. Just speed, privacy, and productivity in your browser.
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