Guides

Guides & worked examples

Short, numeric answers to the questions people actually ask about working with AI.

How many tokens is 1000 words?1000 English words is about 1,330 tokens. Chinese, code, and mixed text differ — worked out with the arithmetic shown.

How many tokens is a book?An 80,000-word novel is about 106,400 tokens. What it costs to summarize one, on each major model.

GPT-6.1 Sol pricing, explained with examplesGPT-6.1 Sol costs $2 per million input tokens and $10 per million output tokens. What real calls cost.

GPT-5 pricing (previous generation)GPT-5 is no longer the current flagship. Kept so old links don't break — current prices are on the GPT-6 page.

Claude pricing, explained with examplesClaude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens. What real calls cost.

Gemini pricing, explained with examplesGemini 3.8 Flash costs $0.75 per million input tokens and $3.75 per million output tokens, with a 1M-token window. What real calls cost.

8 ways to use fewer tokens (without hurting quality)Trim inputs, cap outputs, cache what repeats, and pick the right model — each technique with the token math.

Tokens vs words vs characters: what's the difference?Words are what you write, characters are what you count, tokens are what you're billed for. How they convert.

How much can you paste into ChatGPT?ChatGPT's usable context depends on the model: ChatGPT now runs GPT-6, and the GPT-6 family's API context window is 1,050,000 tokens — about 787,500 English words per conversation.