FREE TOOL
AI Token Cost Calculator
Estimate costs for 200+ LLM models instantly. Paste your prompt, select a model, and see exact pricing in USD & INR — no API key needed.
Paste text and select a model to see cost estimate
How AI Token Pricing Works
Large Language Models (LLMs) process text in units called tokens. A token is typically 4 characters or about 0.75 words in English. When you send a prompt to an AI API like OpenAI, Anthropic, or Google, you're billed based on the number of input and output tokens processed.
Different models have different pricing tiers. For example, GPT-4o costs significantly less than GPT-4 Turbo for the same task, while open-source models like Llama 3 via providers like Together AI or Groq can be even cheaper. Output tokens typically cost 2-4x more than input tokens.
This calculator uses the same tokenizer (tiktoken) that OpenAI uses internally, giving you accurate token counts. For non-OpenAI models, the count serves as a reliable estimate since most modern LLMs use similar BPE tokenization.
Frequently Asked Questions
What are AI tokens?+
Tokens are the basic units that AI language models use to process text. They're created by breaking text into sub-word pieces using a method called Byte Pair Encoding (BPE). In English, one token is roughly 4 characters or 0.75 words. Code tends to use more tokens per character than natural language.
How accurate is this calculator?+
For OpenAI models (GPT-4, GPT-4o, o1, o3), the token count is exact — we use the same tiktoken library. For other models (Claude, Gemini, Llama), it's a very close estimate since most use similar BPE tokenization with comparable vocabulary sizes.
Are the prices real-time?+
Yes — model pricing is refreshed automatically every 30 minutes so you always see the latest rates from all major providers without needing your own API keys.
Is this tool free?+
Yes — the AI Token Calculator is completely free to use with no sign-in required. Just paste your prompt, pick a model, and get instant cost estimates.