Free AI token calculator updated May 2026. Estimate and compare LLM API token costs across the latest OpenAI, Anthropic, Google, xAI, and Cohere models. Project daily, monthly, and yearly spend by number of users and messages per day.
Multiply users by messages per user per day by tokens per message (default 750 input + 250 output), then apply each model's per-million-token rate. Daily cost is the base; monthly = daily × 30; yearly = daily × 365.
1 token ≈ 4 characters of English ≈ 0.75 words. Common conversions:
cost = (input_tokens / 1,000,000) × input_price + (output_tokens / 1,000,000) × output_price. A 2,000-token prompt with a 500-token reply on Claude Sonnet 4.6 ($3 / $15 per 1M) costs $0.0135. The same request on GPT-5.5 ($5 / $30) costs $0.025; on Gemini 3.5 Flash ($1.50 / $9) it's $0.0075; on GPT-5 nano ($0.05 / $0.40) it's just $0.00030.
Input cost for 1,000 tokens in May 2026 ranges from $0.00005 (GPT-5 nano) to $0.030 (GPT-5.5 Pro). Output tokens are 4–6× more expensive. Use the AI Token Calculator above to size your own prompts.
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