Token Intelligence
Cross-model tokenization analysis for high-precision prompt engineering. Built with the official tokenizers for OpenAI and Anthropic; everything is computed in your browser.
Input prompt
Characters
0
Words
0
OpenAI
GPT-4o
tokens
Anthropic
Claude
tokens
Gemini
tokens
Architect’s note
Different providers split words differently. Anthropic usually runs slightly lower than OpenAI for the same English text; Gemini has no public browser tokenizer, so its figure is a character estimate. For billing-critical numbers, call the provider’s own token-counting endpoint.