Look up any term in AI.
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Glossary
256 terms, each with a worked definition, how it actually works, and where it breaks.
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What each model is good at, what it costs per token, and when the size matters.
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Browse the directoryExplainers
Longer pieces on the things a definition cannot hold: benchmarks, costs, and claims worth checking.
Read the blogStart with the load-bearing ideas
The terms the rest keep referring back to. Read these and most AI writing stops being opaque.
Vector Database
A vector database stores embeddings with metadata, builds an approximate-nearest-neighbour index over them, and serves filtered similarity queries at scale.
Audio Processing (AP)
How computers turn sound into numbers: sampling, the Nyquist limit, spectrograms and mel filterbanks — the front end of every speech and audio model.
Model Routing
Model routing sends each request to the cheapest capable model — a small model handles the easy majority and hard queries escalate to a frontier model.
Residual Connections (Skip Connections)
Residual connections add a block's input back to its output — F(x) + x — the trick that lets gradients flow through deep nets and made transformers trainable.
Content Provenance (C2PA)
A cryptographically signed record of where a file came from — proving what device or model made it, instead of guessing from pixels whether it is AI-generated.
Classifier-Free Guidance (CFG)
Classifier-free guidance (CFG) is how a diffusion model follows a prompt: each step runs the model with and without the prompt and extrapolates the gap.
Recently updated tools
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AgentGPT
Reworkd AI · Web Application
Open-source, browser-based autonomous AI agent from Reworkd. You name a goal, the agent plans tasks, executes them, and learns from the results.
FreemiumDola (formerly Cici)
ByteDance · Web, Mobile & Desktop Application
ByteDance's overseas AI assistant, renamed from Cici in November 2025. Free chat, translation and image generation, region-locked out of the US and China.
FreeKimi Code
Moonshot AI · CLI Tool & Editor Integration
Moonshot AI's open-source terminal coding agent: an MIT-licensed CLI with MCP and editor integration, driving Kimi K3 and K2.7 Code via Kimi membership.
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