Price

Detailed instructions on billing rules, how to recharge, and how to check billing.

Model Pricing

Using Claude Opus 4.7 (API Format: Anthropic) as an example:

What is a token?

A token is the basic unit of text that the model processes. Tokens are not the same as characters or words — they are text fragments determined by the model’s own tokenizer.

Text Example	Approx. Characters	Approx. Tokens
English word	4–5 characters	~1 token
Chinese character	1 character	~1.5–2 tokens
1,000-word English article	~5,000 characters	~750 tokens
1,000-character Chinese article	~1,000 characters	~1,500–2,000 tokens

These are estimates. Different providers such as OpenAI, Google, and Anthropic have slightly different token calculation rules.

Token Types and Billing Rules (Claude Opus 4.7)

Input Tokens (Prompt) — $5 / million

Everything you send to the model — system prompt, conversation history, user messages, uploaded documents — all counts as input tokens.

Output Tokens (Completion) — $25 / million

The text the model generates in response. Output tokens cost 5× more than input tokens, so keeping responses concise has a meaningful impact on cost.

Cached Tokens — Billed at 0.25× input rate

Prompt content served from cache is charged at only 25% of the normal price. Useful for long system prompts or repeated context, and can significantly reduce costs.

Cost Estimation Examples

Scenario	Input	Output	Estimated Cost
Short conversation	1K tokens	500 tokens	~$0.020
Medium task	10K tokens	3K tokens	~$0.138
Large codebase analysis	100K tokens	10K tokens	~$0.825

Top-Up

After logging into your account on the x6.ai model page, click your avatar in the top-right corner, then click “Top-Up”.

Platform Fee

Payment Method	Fee	Note
Credit card	0	minimum ≥ 2 USD
Alipay	0	minimum ≥ 2 USD

When you top up USD, you will receive WAI Credits. 1,000 WAI Credits = $1.00 USD.
New users will receive $2 worth of credits.

Billing

You can view detailed Billing, Logs, and Usage information at here.