Definio is a Chrome extension that puts multiple premium AI models in one place. Instead of maintaining separate subscriptions, you can use a single interface with usage-based pricing (per minute or per model).
Access to leading AI models
Definio includes models from major providers and lets you switch between them directly in your browser, depending on the task.
- Anthropic: Claude Opus, Sonnet, Haiku
- OpenAI: GPT‑4.1, GPT‑5, and Mini/Nano variants
- Google: Gemini 2.5
Built into everyday browsing
Definio is designed for in-context work while you read and research online.
- Select text on any page to get an explanation, translation, summary, or rewrite
- Use the sidebar chat for longer conversations without leaving the page
Usage-based billing and spend control
You choose when to use more powerful models and when to switch to lighter options to manage costs. This setup fits people who use AI regularly but don’t want multiple paid subscriptions at the same time.
