Token Counter & Calculator
Count tokens, estimate cost, and compare the same input across OpenAI, Anthropic, Google, Meta, and Mistral — instantly, in your browser, no signup.
Show advancedwhitespace · token IDs · cost at scale
$2.5/M in · $15/M out
Compare across models16 models
| Model | Tokens | vs. selected | Context | Input $/M |
|---|---|---|---|---|
GPT-5.5OpenAI | 0 | 1,100K | $5 | |
Claude Opus 4.8Anthropic | 0 | 1,000K | $5 | |
Gemini 3.5 FlashGoogle | 0 | 1,000K | $1.5 |
Click a row to switch the selected model.
Building an agentic flow? Aiven gives your agents production data.
Once you've optimized the prompt, your agent still needs managed databases, streams, and vectors. Aiven's MCP plugs your agent into all of them — securely, in minutes.
The Aiven Token Counter is a free online tool that shows exactly how any major LLM tokenizes your text - with live token, character, and word counts, a colour-coded visual breakdown, context-window usage, and per-call cost estimates.
Paste your text and pick a model from the dropdown to see the token count, visual breakdown, and cost estimate update instantly. Switch to Chat / role mode to count tokens across system and user messages, or expand Compare across models to see the same input tokenized by every supported model side by side
Your text never leaves your browser. Tokenization runs entirely client-side using the real tokenizer for each model (or a calibrated approximation for closed models), so nothing is sent to Aiven or any third party.
The Aiven Token Counter is free