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AI models explained
Plain-language explanations of how large AI models work and how they differ.
Guides
What is a large language modelWhat an LLM is, how it is built, and the four papers behind it, with links to token, price and context data.Claude vs ChatGPT vs GeminiClaude, GPT-6 and Gemini 4 API tiers compared on price, context, output limits, caching and batch.Open source vs open weight LLMsOpen weight vs open source AI: the OSI definition, real licence examples, and a checklist.The Transformer model explainedWhat the Transformer is, how attention works, and why it shapes cost and context limits.