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Prompt Token Budget Planner

tokens
Paste text to auto-count tokens

Estimated at ~3.5 chars/token for Claude

tokens
Paste text to auto-count tokens

Estimated at ~3.5 chars/token for Claude

tokens
Paste text to auto-count tokens

Estimated at ~3.5 chars/token for Claude

tokens
Paste text to auto-count tokens

Estimated at ~3.5 chars/token for Claude

tokens
Paste text to auto-count tokens

Estimated at ~3.5 chars/token for Claude

01,000,000 tokens
Total Allocated
11,000
1.1% of context
Remaining
989,000
98.9% available
Est. Turns
~1978
at 500 tokens/turn
Status
Healthy
Good balance

About Token Budget Planning

This tool helps you plan how to allocate your model's context window across different sections of your AI system prompt. Use it to ensure you leave enough room for conversation history while including necessary context.

Token estimates use ~3.5 chars/token for Claude. Actual counts may vary. For precise counting, use the Token Counter tool.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

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Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/token-budget-planner/

For automation planning, fetch the canonical contract at /api/tool/token-budget-planner.json.

How to Use Prompt Token Budget Planner

  1. 1

    Add system prompt

    Paste your AI system prompt into the tool. It automatically calculates token count using the model's tokenizer (GPT, Claude, etc.).

  2. 2

    Set input/output budgets

    Specify maximum tokens for user input, expected output length, and total context window. The planner shows available budget visually.

  3. 3

    Add example exchanges

    Paste sample user questions and model responses to test real token usage under your expected load patterns.

  4. 4

    Visualize token allocation

    View a pie chart showing system prompt, user input, output buffer, and remaining tokens. Adjust ratios to optimize.

  5. 5

    Export budget report

    Download a summary showing per-token cost, recommended model size, and optimization suggestions for your use case.

Frequently Asked Questions

What is Prompt Token Budget Planner?
Prompt Token Budget Planner helps you visually plan how to allocate tokens across different sections of your AI system prompt. It shows usage against model context window limits.
How do I use Prompt Token Budget Planner?
Select your target AI model, then add sections for your system prompt (instructions, examples, context). The tool shows a visual breakdown of token usage and warns when you approach the context limit.
Does Prompt Token Budget Planner store or send my data?
No. All processing happens entirely in your browser. Your prompt content never leaves your device — nothing is sent to any server.
Why do I need to plan my token budget?
AI models have fixed context windows. If your system prompt uses too many tokens, there is less room for user messages and responses. Budget planning helps you optimize prompt length for better results and lower costs.