# nanobrowser vs ChatGPT Agent
_Browser & Computer Use · independent comparison_

> nanobrowser and ChatGPT Agent take different routes to the same job: one is a commercial product, the other open-source and self-hostable. Choose based on whether you want a managed experience or full control.

## Side by side

**nanobrowser**
- Open source · Agent · 14k★ · TypeScript · Apache-2.0 · active 8 months ago
- Best for: A free in-browser alternative to OpenAI Operator using your own LLM keys.
- Avoid if: You rely on small local models — they need cleaner prompts and more iterations.
- [listing](https://agentsearchengine.app/agents/nanobrowser) · [official](https://nanobrowser.ai)

**ChatGPT Agent**
- Paid product · Agent
- [listing](https://agentsearchengine.app/agents/openai-operator) · [official](https://openai.com)

## Key differences

- ChatGPT Agent is a commercial product; nanobrowser is open-source and self-hostable.
- Pricing model differs — nanobrowser is open source, ChatGPT Agent is paid product.

## Which to choose

**Choose nanobrowser if:** A free in-browser alternative to OpenAI Operator using your own LLM keys.

**Choose ChatGPT Agent if:** you want a managed, commercially-supported product.

## FAQ

**What's the main difference between nanobrowser and ChatGPT Agent?**
ChatGPT Agent is a commercial product; nanobrowser is open-source and self-hostable.

**Is nanobrowser or ChatGPT Agent better?**
Neither is universally better. nanobrowser is the stronger fit for A free in-browser alternative to OpenAI Operator using your own LLM keys; ChatGPT Agent for a managed, commercially-supported product. Use the side-by-side specs to decide by your own constraints.

**Is nanobrowser or ChatGPT Agent free?**
nanobrowser is free to run and self-host; ChatGPT Agent is a paid product.

**Which is more popular, nanobrowser or ChatGPT Agent?**
We rank open-source projects by GitHub adoption, but at least one of these is a commercial product and stars don't measure commercial adoption — so compare them on capabilities and pricing instead.

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Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/compare/nanobrowser-vs-openai-operator