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Multimodal

A model that handles more than text — images, audio, video, screen pixels.

Definition

A model that accepts and/or produces multiple modalities. A vision-language model can read a screenshot, a speech model can transcribe audio, and a generative model can produce an image.

Most modern frontier models are natively multimodal: images go in as tokens alongside text. This is what makes screen-reading agents and document understanding practical.

Multimodal input changes what an agent can perceive, which widens the class of tasks it can attempt: reading a chart, operating software with no API, transcribing a meeting. It also widens the attack surface, because every pixel and every audio sample is untrusted input that can carry instructions.

How people use it
Scoping an invoice-processing feature.
"Send the PDF straight to the multimodal model as an image. No OCR pipeline, no layout parser."
Worked example

Multimodal as the unlock for computer use

Automating a legacy internal tool with no API and no export.

Screenshots plus mouse and keyboard are enough to drive it, because the model can read the rendered screen. The trade-off is speed and reliability: DOM-level automation is faster and steadier where it exists, so reserve vision for the gaps.

Sources
  • paperGemini: a family of highly capable multimodal models ↗Google Gemini Team (arXiv) · 2023

    A natively multimodal model family — the technical counterpart to "multimodal model" as a product category.

  • docsComputer use tool ↗Claude platform docs · 2026

    Screenshot, mouse and keyboard as a tool loop, with the safeguards that belong around it: isolated environments, minimal privileges, network limits, human confirmation.

  • paperWhy language models hallucinate ↗arXiv (OpenAI researchers) · 2025

    The statistical argument that training and grading regimes reward guessing over admitting uncertainty — so hallucination is an incentive problem, not a gap in knowledge.

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