> For the complete documentation index, see [llms.txt](https://docs.tensorx.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tensorx.ai/billing.md). # Credit & Billing Everything you need to know about payments, credits, and billing on TensorX. *** ## How Billing Works TensorX uses a **prepaid credit system**. You add credits to your account and pay only for what you use based on token consumption. ``` Cost = (Input Tokens × Input Price) + (Output Tokens × Output Price) ``` {% hint style="info" %} **View Live Pricing**: [tensorx.ai/models](https://tensorx.ai/models) - Pricing displayed per 1M tokens. {% endhint %} *** ## Payment Methods We accept multiple payment options to make it easy for developers worldwide: | Method | Type | Supported | | --------------------- | ----------- | ---------------------- | | **Credit/Debit Card** | Traditional | Visa, Mastercard, Amex | *** ## Adding Credits To add credits to your account: 1. Log in to [app.tensorx.ai](https://app.tensorx.ai) 2. Navigate to your [dashboard](https://app.tensorx.ai/dashboard) 3. Click **Add Credits** 4. Choose your payment method and amount 5. Complete the payment Credits are added to your account instantly after successful payment. {% hint style="warning" %} **Rate limits:** Depositing credits does not change your rate limit tier. Tiers are based on your **total consumed spend** — the cumulative dollar value of tokens you have actually used — not your credit balance. See [Rate Limits](https://docs.tensorx.ai/api-reference/rate-limits) for tier details and how to request higher limits. {% endhint %} *** ## Balance Management ### Minimum Balance Requirement {% hint style="warning" %} **Important:** When your balance falls below **$0.05**, your account and API keys will be automatically disabled to prevent negative balance. You must top up your account to re-enable access. {% endhint %} ### Low Balance Notifications You'll receive notifications when your balance is running low: * Email alerts sent automatically at a fixed low-balance threshold * Dashboard warnings when balance is low ### Re-enabling Your Account If your account has been disabled due to low balance: 1. Log in to [app.tensorx.ai](https://app.tensorx.ai) 2. Add credits to your account 3. Your API keys will be automatically re-enabled once your balance is above $0.05 *** ## Usage & Monitoring Track your credit usage and API activity in your [dashboard](https://app.tensorx.ai/dashboard): * **Usage History** - See all API requests and costs * **Credit Balance** - Check remaining credits * **Usage Trends** - Monitor your consumption over time * **API Key Usage** - Track usage per API key *** ## Pricing Pricing is based on token usage. Each model has different rates for input and output tokens. {% hint style="success" %} **View Current Pricing**: [tensorx.ai/models](https://tensorx.ai/models) All pricing is displayed per 1M tokens. {% endhint %} ### How to Estimate Costs * **1 token ≈ 4 characters** of English text * **100 tokens ≈ 75 words** * A typical API request with a short prompt and response might use 500-2000 tokens ### Usage controls 1. Compare current model pricing and capabilities in the [model catalogue](https://tensorx.ai/models). 2. Set an explicit response limit only when the application requires one. 3. Keep system prompts concise. 4. Cache reusable responses where appropriate. 5. Monitor usage in the dashboard. *** ## Refund Policy {% hint style="info" %} **24-hour refund window.** If you need a refund, contact within 24 hours of your purchase. After 24 hours, all purchases are final and credits become non-refundable. {% endhint %} Test the platform before making a larger purchase. *** ## FAQ ### Do credits expire? No, credits do not expire. Use them whenever you need. ### Can I get an invoice? Yes, every top-up generates an invoice you can download yourself: 1. Sign in to the [dashboard](https://app.tensorx.ai). 2. Open **Billing** from the sidebar. 3. In the **Recent Transactions** list, click the **Invoice** button next to the deposit you want. The invoice opens in a new tab with a **Download PDF** option. ### What happens when I run out of credits? When your balance falls below $0.05, your account and API keys will be disabled. API requests will return authentication errors. Add credits to re-enable your account. ### Is there a minimum purchase? Check [tensorx.ai](https://tensorx.ai) for current minimum purchase amounts. ### Can I set up auto top-up? Yes. Auto top-up is self-serve from your [dashboard](https://app.tensorx.ai/dashboard). You set two values: 1. A **trigger balance** — when your credit balance falls to this amount, a top-up is made automatically. 2. A **refill amount** — the amount of credit added each time the trigger is reached. No support request is needed to switch it on or off. *** ## Need Help? * **Email**: * **Contact Support**: [Contact page](/support/support.md) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.tensorx.ai/billing.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.