Fast, clean developer tools and deep references — all in one place. Everything runs in your browser: nothing uploaded, nothing tracked.
Context windows, MCP, RAG, embeddings & more — explained clearly, with tools.
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Clean UI, keyboard-friendly, and zero fluff.
The model's working memory — tokens, what fills it, why it runs out, and how to manage it.
Read more →The open standard for connecting AI apps to tools and data — the 'USB-C for AI tools.'
Read more →Grounding a model in your own documents at query time — embeddings, retrieval, and why it beats fine-tuning for facts.
Read more →How content becomes a vector that captures meaning — the engine behind semantic search, RAG, and recommendations.
Read more →How a model decides to call a function, returns structured arguments, and your code runs it — the basis of agents.
Read more →Making a model return JSON that matches a schema every time — vs JSON mode, and why it powers extraction and tool calls.
Read more →New tools, deep-dive articles, and developer tips.
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