AI Token & Cost Calculator

Count prompt tokens across tokenizer families, compare current API costs, and check context-window fit. OpenAI-family raw text uses local BPE tokenization while unsupported families are explicitly marked as estimates.

1. 1.Paste a prompt or import a supported text file.
2. 2.Choose an expected output size.
3. 3.Search and compare model costs or context fit.
4. 4.Use Budget for affordable requests and volume projections.
5. 5.Use Subscription for a cautious usage-pressure estimate.

• •Prompt text remains in the browser.
• •Worker-based, family-deduplicated tokenization.
• •Live Models.dev pricing with LiteLLM and bundled fallbacks.
• •Cost, context, budget, volume, and subscription views.