Free Developer Utility
LLM Token Calculator
& Pricing Estimator
Instantly calculate context size and estimate API costs for GPT-4o, Claude 3.5, and Llama 3. Runs 100% locally in your browser for total data privacy.
Tokenization runs entirely in your browser. No data is sent to our servers. (cl100k_base encoding)
Usage Metrics
Token Count
0
Character Count
0
Cost Estimator
Standard multimodal flagship model
Estimated Input Cost
$0.000000
Based on $5 / 1M tokens
Frequently Asked Questions
Token Calculator FAQ
Common questions about local tokenization and cost estimation.
This tool uses the cl100k_base Byte-Pair Encoding (BPE) algorithm compiled to JavaScript/WebAssembly to run natively in your browser. It accurately calculates token counts for OpenAI models (GPT-4o, GPT-3.5) and provides a highly accurate estimate for Claude and Llama 3 models without sending your data to any server.