What Is an AI Token? Model Tokens and App Credits Explained
An AI token is a chunk of text, usually a few characters, that a language model reads or generates. AI providers measure context limits and usage in tokens, while apps may use simpler billing units such as credits.
Explanation
Language models like GPT-5.2 and Claude process text as tokens - small pieces of words. "Transformation" might be split into 3 model tokens. AI providers bill developers per million of these model tokens, which is precise but hard to predict as a user.
Apps can simplify that provider pricing into credits. A credit represents a completed app action regardless of how many model tokens the provider processed, so users do not need to estimate character counts.
In Echoo, one credit is used after one successful managed AI command: a rewrite, a translation, a summary, or a cleanup. Failed commands do not use credits, and commands run in BYOK mode or on local models never use Echoo credits.
How Echoo Helps
Echoo uses credits for managed plans: every new user gets 10 free credits with no API key or card, Pro includes 300 credits per month for $6.99, and Max includes 600 credits for $9.99. BYOK mode and local models do not use Echoo credits - you pay your provider directly if it charges.
Related Terms
API Key
An API key is a unique string of characters that authenticates your requests to an AI service. When you use tools like OpenAI, Anthropic, or Google Gemini, your API key proves your identity and tracks your usage for billing.
BYOK (Bring Your Own Key)
BYOK (Bring Your Own Key) is a model where an AI tool lets you use your own API key from an AI provider rather than routing your data through the tool's servers. This gives you direct control over privacy, costs, and model selection.
Context Window
A context window is the maximum amount of text an AI model can process in a single request, measured in tokens. Tokens are roughly equivalent to words (1 token ≈ 0.75 words). Larger context windows allow processing longer documents.
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Frequently Asked Questions
No. Model tokens are text fragments the AI reads and writes, and thousands can be used in one request. An Echoo credit is used after one successful managed AI command, whatever its length.
You can upgrade to Pro (300 credits/month) or Max (600 credits/month), wait for your monthly allowance to reset, or switch to the free BYOK mode with your own API key or a local model. BYOK commands never use Echoo credits.
No. Echoo uses a credit only after a successful managed AI command. If a command fails, your credit balance is untouched.
300 credits cover 300 successful managed AI commands - about 14 per working day. A grammar fix, a translation, and a rewrite each use one credit regardless of text length.
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