AI & developer tools
AI Token & LLM API Cost Calculator
Estimate monthly LLM API costs from prompt and output tokens, and find the cheapest 2026 model for your workload.
- 8 models priced per 1M tokens
- Input vs output cost split
AI & Developer Tools
Two tools for the same question: how big is this prompt, and what does it cost to send? Paste any prompt, document or snippet into the token counter for a character, word and token count priced against GPT-4o, Claude 3.5 Sonnet and Gemini 1.5 Pro, then use the full estimator to turn prompt size, answer size and daily request volume into a monthly API bill across eight models.
Everything runs locally in your browser. Your text is never uploaded, and no account is required.
Available tools (2)
AI & developer tools
Paste-to-Token & Prompt Cost Counter
Paste a prompt, document or code to count characters, words and estimated tokens, and price that text as API input on GPT-4o, Claude 3.5 Sonnet and Gemini 1.5 Pro.
- Characters, words and tokens
- Input cost for three flagship models
How these tools connect
Count first: the Paste-to-Token & Prompt Cost Counter turns a pasted prompt into characters, words and an estimated token count, then prices that count against published input rates per million tokens. Use it when you have one prompt and need its size and cost right now.
Forecast next: the AI Token & LLM API Cost Calculator takes prompt tokens, output tokens and daily request volume and turns them into monthly input, output and total cost across eight 2026 models, flagging the cheapest alternative. Use it when you are budgeting a product rather than a single request.
Both tools estimate from list prices per million tokens. Cached-input, batch and long-context discounts are not modelled, so treat every figure as a planning estimate and confirm current rates with the provider.