LLM Token Counter & Cost Estimator
Estimate tokens and API cost for GPT-4o, Claude, Gemini, and Llama
Token counts are estimates based on average characters-per-token (~4 for GPT-4o). Actual counts from the model's tokenizer may differ by 5–15%. Prices reflect published rates and may change — check the provider's pricing page for authoritative numbers.
How it works
- 1Paste your prompt
Drop the full prompt — system message, user message, or a long RAG context.
- 2Pick a model
Choose GPT-4o, Claude, Gemini, or Llama. Each model has its own price and tokenizer ratio.
- 3Set expected output tokens
Add the response length you expect. The tool shows per-call cost and 1K / 1M-call totals.
About LLM Token Counter & Cost Estimator
Free online LLM token counter and cost calculator. Paste any prompt to estimate the token count for GPT-4o, GPT-4o mini, Claude Opus/Sonnet/Haiku, Gemini 2.0, and Llama 3, plus the per-call and per-1M-call API cost. Runs entirely in your browser. LLM Token Counter & Cost Estimator on 712 Tools runs entirely inside your browser using modern JavaScript APIs — no server ever sees your data. That means instant results, complete privacy, and no upload limits.
Whether you need to estimate tokens and api cost for gpt-4o, claude, gemini, and llama for a debugging session, a quick sanity check, or a production incident, this tool is free to use as many times as you need. There are no watermarks, no sign-up, and no ads inside the tool itself.
Frequently asked questions
How accurate are the token counts?
They're estimates based on average characters-per-token (~4 for GPT, ~3.6 for Claude). Actual counts from the model's real tokenizer usually differ by 5–15%.
Where do the prices come from?
Published rates from OpenAI, Anthropic, Google, and hosted-Llama providers. Rates change — always verify with the provider before building financial projections.
Does it upload my prompt?
No. Counting and cost math run entirely in your browser.
Why does context-used % matter?
If a prompt approaches the model's context window, the model may truncate or refuse. The gauge helps you stay well under the limit.
Read more
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