LLM Token Counter & Cost Estimator

Estimate tokens and API cost for GPT-4o, Claude, Gemini, and Llama

🔒 100 % in-browser🆓 Gratuit pour toujours⚡ Pas de signup
Note : L'interface de l'outil ci-dessous n'est actuellement disponible qu'en anglais. On traduit les UI une par une. Voir cet outil en anglais →
Characters
0
Words
0
Tokens (est.)
0
Context used
0.00%
Estimated cost per call
Input (0 × $2.5/1M)$0.000000
Output (500 × $10/1M)$0.005000
Total per call$0.005000
× 1,000 calls$5.00
× 1,000,000 calls$5000.00

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.

Comment ça marche

  1. 1
    Paste your prompt

    Drop the full prompt - system message, user message, or a long RAG context.

  2. 2
    Pick a model

    Choose GPT-4o, Claude, Gemini, or Llama. Each model has its own price and tokenizer ratio.

  3. 3
    Set expected output tokens

    Add the response length you expect. The tool shows per-call cost and 1K / 1M-call totals.

À propos de 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 sur 712 Tools tourne entièrement dans ton browser via des APIs JavaScript natives - aucun server ne voit jamais tes données. Résultats instantanés, privacy complète, et aucune limite d'upload.

Que ce soit pour une session de debug, un sanity check rapide ou un incident en prod, cet outil est gratuit à utiliser autant que tu veux. Pas de watermarks, pas de signup et pas d'ads dans l'outil.

Questions fréquentes

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.

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