How accurate is the AI Token Counter for different LLM models?

AI Token Counter uses the official tokenization algorithms provided by each model vendor. For GPT models, we use OpenAI's cl100k_base encoder. For Claude and Gemini, we implement their respective tokenizers. Accuracy is typically 99.9% matching official API responses. Minor variations may occur with special characters or very recent model updates.

Can I use AI Token Counter to estimate my API costs?

Yes, absolutely. The tool calculates token counts and displays estimated costs based on current pricing for each model. However, actual API costs may vary slightly due to pricing updates or special billing arrangements. Always verify current pricing on the official provider websites for the most accurate cost estimates.

What's the difference between input tokens and output tokens?

Input tokens are the tokens in your prompt or request sent to the model. Output tokens are generated by the model in its response. Most APIs charge differently for each—output tokens typically cost 2-3x more than input tokens. AI Token Counter helps you understand both to better estimate total costs and optimize your prompts.

Why do different models show different token counts for the same text?

Each language model uses a different tokenization algorithm. GPT models break text into tokens differently than Claude or Gemini due to their underlying architectures and training data. This is why the same 100-word paragraph might be 120 tokens in GPT-4 but 130 tokens in Claude. Our tool accounts for these differences automatically.

Is there a token limit I should be aware of when using language models?

Yes, each model has a maximum context window (token limit). GPT-4 supports 8K or 32K tokens, Claude 3 supports up to 200K tokens, and Gemini Pro supports 32K tokens. Exceeding these limits will cause API errors. AI Token Counter helps you verify your prompts stay within these limits before sending requests to avoid failed API calls.

AI Token Counter

Text to count tokens

0 characters0 words0 tokens (estimate)

GPT-4o

OpenAI

0 tokens

0.00% / 128K$0.00

GPT-4o mini

OpenAI

0 tokens

0.00% / 128K$0.00

Claude 3.5 Sonnet

Anthropic

0 tokens

0.00% / 200K$0.00

Claude 3 Haiku

Anthropic

0 tokens

0.00% / 200K$0.00

Gemini 1.5 Pro

Google

0 tokens

0.00% / 1M$0.00

Gemini 1.5 Flash

Google

0 tokens

0.00% / 1M$0.00

Llama 3 70B

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