Chunk Size
The length of text segments stored in a vector index.
/ quick answer
Chunk size trades off recall and precision. Small chunks (200-400 tokens) return tight, on-topic snippets but lose context; large chunks (800-1500) keep context but dilute similarity scores. The length of text segments stored in a vector index.
/ frequently asked
What is Chunk Size?
Chunk size trades off recall and precision. Small chunks (200-400 tokens) return tight, on-topic snippets but lose context; large chunks (800-1500) keep context but dilute similarity scores.
What is an example of Chunk Size?
A legal RAG uses 500-token chunks with 100-token overlap so clauses stay whole.
Why does Chunk Size matter?
The length of text segments stored in a vector index.
What should I learn after Chunk Size?
Open the related workflows and prompts further down this page: they show how this idea is applied in a real task, step by step.
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Related concepts
The vocabulary this page depends on.
- →Retrieval
Selecting the most relevant chunks for a query before generation.
- →RAG (Retrieval-Augmented Generation)
Inject external knowledge into an LLM at query time.
- →Agentic RAG
RAG where an agent decides what to retrieve, when, and from which source — instead of a single static query.
- →Embedding
A numerical vector representation of text, image or audio that captures meaning for similarity search.
Related workflows
Turn this into a repeatable process.
- →How to Create a Website with AI
Go from idea to a live, custom-domain website in one afternoon using AI builders.
- →How to Build an AI Content System
A repeatable pipeline that turns one input into publish-ready content across every channel.
- →How to Start a Niche Website with AI
Pick a niche, validate demand, build the site, and publish ranking content using AI end-to-end.
- →Personal Research Assistant Workflow
A repeatable system to research any topic deeply in under 30 minutes.
Related tool stacks
The tools that run it in production.
- →RAG Starter Stack
Minimum viable stack to ship a production RAG chatbot.
- →AI Research & Knowledge Stack
Default toolset for analysts, founders and creators doing deep research with AI.
Comparisons & alternatives
Pick between the options.
- →ChatGPT vs Claude
Two leading conversational AI assistants compared across reasoning, writing, coding, and pricing.
- →Lovable vs Bolt
Two AI app builders compared on speed, backend, deployment, and production readiness.
- →OpenAI API vs Anthropic API
Choosing between the two leading LLM API providers for production apps.
- →Lovable vs Cursor
Prompt-to-app builder vs AI-assisted code editor — which one should you reach for?