LLM Token & Cost Calculator

100% In-Browser

Estimate prompt tokens and compare costs across GPT-4o, Claude 3.5, Gemini 2.0, and DeepSeek with volume multipliers.

Key Capabilities & Features

✓ 100% Client-side processing with zero server telemetry
✓ Instant copy and download options
✓ Clean formatting and auto-validation
✓ No account or subscription required

Frequently Asked Questions

How are token counts estimated?

The calculator uses standard byte-pair tokenization heuristics (~3.9 characters per token for English text and code) to accurately predict prompt tokens without requiring external API keys.

What pricing rates are used?

Pricing is based on official per-million token rates published by OpenAI (GPT-4o, o1, o3-mini), Anthropic (Claude 3.5 Sonnet, Haiku), Google (Gemini 1.5/2.0 Flash and Pro), and DeepSeek (V3, R1).