What are AI agents?
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An AI agent is an AI system that decides its own next steps and uses tools to get a task done, instead of just answering one question. That makes agents powerful, and harder to control. Full explainer →
What are AI hallucinations?
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An AI hallucination is when a chatbot confidently states something false or made up while sounding completely believable. It's a side effect of how these models generate text, not a sign that the AI is lying. Full explainer →
What are AI reasoning models?
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An AI reasoning model is a language model that works through a problem step by step before it answers: breaking it down, trying approaches and checking its work. That makes it slower and pricier, but more reliable on hard, multi-step problems. Full explainer →
What are open-weight AI models?
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An open-weight AI model is one whose trained parameters (the 'weights') are published for anyone to download and run. That's not the same as fully open-source AI, which also shares training data and code. Full explainer →
What is a context window?
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A context window is how much text an AI model can see and work with at once: your instructions, the conversation so far, any files, and its own reply. It's measured in tokens, small chunks of text of roughly four characters each. Full explainer →