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What is a foundation model?
A foundation model is a large AI model trained on broad data that can be adapted to many different jobs.
- Category Models
- Also called base model
- Updated 20 Oct 2026
Foundation model, explained simply
Instead of building a new AI for every task, makers train one big model first. That model is the foundation.
Then it can be adjusted for writing, coding, answering questions or other work. This saves time and cost.
Many chatbots you know are built on a foundation model, then shaped to be helpful and polite.
On ITG Now, our AI models page and daily news stories cover new foundation models and what they can do.
Related terms
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Questions people ask about Foundation model
What is the difference between a foundation model and an LLM?
An LLM is one kind of foundation model that works with language. Some foundation models handle images or sound too.
Why is it called a foundation model?
Because other tools and apps are built on top of it, like a house on a foundation.