proprietary

Claude

Claude is Anthropic's family of AI models, reached through the Claude apps, the API, or Claude Code. What it is known for and how people use it.

Gemini

Gemini is Google's family of AI models, known for very large context windows and strong handling of long documents, images, and audio.

GPT

GPT is OpenAI's family of models and the engine behind ChatGPT. What separates the two, and how people reach each of them.

Grok

Grok is the model family from xAI, used through the Grok app and inside X, where it can draw on real-time posts.

Open, open-weight, and proprietary models

Proprietary models stay on the company's servers. Open-weight models you download and run yourself. What each label actually means.