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v2026.1714 entries · CC-BY 4.0
Dictionary termTrack CStablev2026.2

Foundation model

A large machine-learning model trained on broad data at scale and adaptable to a wide range of downstream tasks through fine-tuning, prompting, or retrieval augmentation.

ByCASRAI Editorial Board
· Last updated 21 May 2026

Examples

Worked examples

  • Is an instance

    A 70B-parameter LLM adapted by prompting to 30+ downstream tasks without further training.

  • Is an instance

    A vision-language foundation model fine-tuned to radiology, agriculture, and remote sensing applications.

Counter-examples

Looks similar, but isn't

  • Not an instance

    A task-specific small classifier (e.g., a logistic regression for spam).

  • Not an instance

    A handcrafted rule-based system.

Editorial commentary

Bommasani et al. (2021) named foundation models to describe the emerging pattern of training a single very large model and then adapting it to many tasks, in contrast to the prior pattern of one model per task. Foundation models include LLMs (GPT, Claude, Gemini, Llama, Mistral families), vision-language models (CLIP, Flamingo), and increasingly multimodal models.

References

  • Bommasani et al., 'On the Opportunities and Risks of Foundation Models' (Stanford CRFM report, 2021).

Also known as

FM

Machine-readable encodings

Use in your systems

JATS XML <role> element
xml
<role vocab="credit"
      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Foundation model"
      vocab-term-identifier="https://casrai.org/dictionary/term/foundation-model" />
Schema.org DefinedTerm (JSON-LD)
json
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  "@type": "DefinedTerm",
  "name": "Foundation model",
  "identifier": "https://casrai.org/dictionary/term/foundation-model",
  "description": "A large machine-learning model trained on broad data at scale and adaptable to a wide range of downstream tasks through fine-tuning, prompting, or retrieval augmentation.",
  "inDefinedTermSet": "https://casrai.org/dictionary/domain/ai-and-ml-research-outputs/",
  "url": "https://casrai.org/dictionary/term/foundation-model",
  "sameAs": [
    "FM"
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/"
}

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