AI tooling
Tokens
Token counting, visualization, RAG chunking, embedding dimensions.
- Token Counter
Count tokens for GPT-4o, GPT-4, GPT-3.5 and more — tokenizer-exact, runs in your browser.
- Multi-model Token Compare
Side-by-side token counts for the same input across GPT-4o, GPT-4 Turbo, GPT-3.5, Claude, Gemini.
- Context Window Calculator
Pick a model, paste your prompt, see how much context you have left after reserving output tokens.
- RAG Chunk Estimator
Estimate chunk count and embedding token spend from chunk size + overlap + corpus size.
- Embedding Dimension Reference
Reference table of embedding model output dimensions, max input tokens, and pricing.