the short answer
What is the fastest free way to estimate LLM API cost?
Paste your prompt into AI Token Cost Calculator and read the comparison table. You get character, word, and estimated input token counts, pick an expected output size, and see input, output, and total cost for 16 models side by side. Nothing is uploaded — the math runs locally in your browser.
comparison
AI Token Cost Calculator vs. the usual options.
Builders typically estimate LLM cost one of four ways. Each fits a different job — pick the row that matches yours.
| Option | Multi-provider | Upload required | Exact tokenizer | Best for |
|---|---|---|---|---|
| AI Token Cost Calculator | Yes — 16 models, 6 providers | No — runs in your browser | Approximate (~4 chars/token) | Quick model comparison before you pick a provider |
| Provider tokenizer tools | No — one provider at a time | Varies | Exact for that provider | Final token count for a single model you already chose |
| Spreadsheet | Manual — you maintain rates | No | Whatever you type in | Monthly budgets with custom volume assumptions |
| Paid cost dashboards | Yes — with API keys connected | Yes — live usage data | Exact from billing | Production apps tracking real spend over time |
why it matters
Why a browser-local estimator helps.
Prompts often contain product specs, customer data, or unreleased copy. Uploading them to a third-party cost calculator exposes that text for a task that does not need a server. AI Token Cost Calculator keeps your paste on your device and uses hard-coded public pricing — no API keys, no account.
what you get
What the free tool includes.
- Real-time character, word, and estimated input token counts.
- Output size presets (Short / Medium / Long) plus custom token count.
- Side-by-side cost table with a cheapest badge.
- Session-only rate overrides for negotiated or promo pricing.
- Last verified date and links to official provider pricing pages.
how to
Compare models in under a minute.
- Open AI Token Cost Calculator.
- Paste your prompt or document.
- Choose an expected output size.
- Scan the table — the green Cheapest badge marks the lowest total.
- Follow the provider pricing link to confirm rates before you budget.