Token Counting Python Packages

puretiktoken

tiktoken in pure Python: byte-for-byte compatible BPE tokenizer for GPT-4/4o, no Rust extension, zero dependencies

burnlens

Open-source LLM FinOps proxy — track OpenAI, Anthropic (Claude), and Google Gemini costs by feature, team, and customer. Zero code changes. pip install burnlens.

runtoken

A blazing-fast BPE tokenizer for LLMs. Drop-in tiktoken replacement, 20-80x faster.

context-budget

Claude Code context window budget calculator — know your token cost before you load

tokenbudget

Lightweight token tracking, cost management, and budget enforcement for LLM API calls

slash-tokens

Token budget estimation in 4.8 KB WASM. Sub-millisecond. Zero dependencies.

tokonomix

Universal LLM token counting and cost management. Track, compare, and optimize your LLM API spending.