AI Token Calculator — Compare GPT-5.5, Claude Opus 4.7, Gemini 3.5 Flash, Grok 4.3 & Cohere Command API Costs

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.

2026 LLM API pricing (per 1M tokens)

  • OpenAI GPT-5.5 Pro — $30.00 input / $180.00 output
  • OpenAI GPT-5.5 — $5.00 input / $30.00 output
  • OpenAI GPT-5.4 — $2.50 input / $15.00 output
  • OpenAI GPT-5.4 mini — $0.75 input / $4.50 output
  • OpenAI GPT-5 — $1.25 input / $10.00 output
  • OpenAI GPT-5 mini — $0.25 input / $2.00 output
  • OpenAI GPT-5 nano — $0.05 input / $0.40 output
  • Anthropic Claude Opus 4.7 — $5.00 input / $25.00 output
  • Anthropic Claude Sonnet 4.6 — $3.00 input / $15.00 output
  • Anthropic Claude Haiku 4.5 — $1.00 input / $5.00 output
  • Anthropic Claude Opus 4.1 (legacy) — $15.00 input / $75.00 output
  • Google Gemini 3.1 Pro — $2.00 input / $12.00 output
  • Google Gemini 3.5 Flash — $1.50 input / $9.00 output
  • Google Gemini 3 Flash — $0.50 input / $3.00 output
  • Google Gemini 3.1 Flash-Lite — $0.25 input / $1.50 output
  • Google Gemini 2.5 Pro (legacy) — $1.25 input / $10.00 output
  • xAI Grok 4.3 — $1.25 input / $2.50 output
  • Cohere Command A — $2.50 input / $10.00 output
  • Cohere Command R+ — $2.50 input / $10.00 output
  • Cohere Command R — $0.15 input / $0.60 output
  • Cohere Command R7B — $0.0375 input / $0.15 output

How the AI Token Calculator works

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.

Best AI model by use case

  • Deep reasoning & research: GPT-5.5 Pro, Claude Opus 4.7, Gemini 3.1 Pro.
  • Coding agents: GPT-5.5, Claude Sonnet 4.6, Grok 4.3.
  • High-volume chat & RAG: Gemini 3.5 Flash, Claude Haiku 4.5, GPT-5 mini.
  • Ultra-cheap classification & tagging: GPT-5 nano, Gemini 3.1 Flash-Lite, Cohere Command R7B.

Token size reference

1 token ≈ 4 characters of English ≈ 0.75 words. Common conversions:

  • 1,000 tokens ≈ 750 words ≈ 1.5 single-spaced pages.
  • 10,000 tokens ≈ 7,500 words ≈ 15 single-spaced pages.
  • 100,000 tokens ≈ 75,000 words ≈ 150 pages — a typical non-fiction book.
  • 200,000 tokens ≈ 150,000 words ≈ 300 pages — a full-length novel like The Hobbit.
  • 1,000,000 tokens ≈ 750,000 words ≈ 1,500 pages — all 7 Harry Potter books combined.
  • 2,000,000 tokens ≈ 1,500,000 words — Gemini 3.1 Pro's maximum context window.

How to calculate the cost of an AI API request

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.

How much money is 1,000 tokens?

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.

Common AI token calculator questions

The AI Token Calculator answers questions like: How do you calculate AI tokens? How is an AI token calculated? How much money is 1000 tokens? How many pages are 10,000 tokens? What are conversation tokens? How many words are 1,000,000 tokens? How many tokens per page on average? How much text is 1000 tokens? How many is 1 million tokens in AI? How many pages are 1 million AI tokens? How much text is 1,000,000 tokens? What is 1 million token? What can you do with a million AI tokens? What does 1 million tokens in AI mean? How much text is 200,000 tokens? How many words are 200,000 tokens? What are 200K tokens in Claude? How much text is 100K tokens? Is a 200K context window big? Is 200,000 words a long book? How to calculate the cost of an AI API request? What are the best practices for managing AI token costs? Where can I find an online tool to count tokens for large language models? Where can I find an AI token calculator tool for developers? Compare AI token calculators for natural language processing tasks. Compare token pricing across different generative AI platforms. Are there AI token calculators with free trials?