AI Prompt Token & API Cost Estimator
Estimate LLM prompt token counts and API costs across OpenAI, Claude, Gemini, and Llama models 100% offline.
[ SPECIFICATION // SECURITY ]: Context window token counter and prompt density analyzer running 100% in-browser without dispatching text payloads to external APIs.
Standard: BPE / Byte-Pair Encoding Context Sizing
[ VERIFIED // LOCAL EXECUTION ][ ZERO TELEMETRY ][ OFFLINE PWA ][ OPEN SOURCE // MIT ]
[ 1. PROMPT & CONTEXT PAYLOAD ]
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[ 2. ESTIMATED API INFERENCE COSTS ]
| Model & Provider | Rate / 1M | USD Cost | IDR Cost |
|---|---|---|---|
| Enter text on left to calculate model costs. | |||
Estimated using BPE subword heuristics (~3.8 chars/token). Rates based on 2026 official input pricing table.
[ PROMPT OPS & OPTIMIZATION ]
DSPy Declarative Prompting & Structured Logits Generation
Maximize token efficiency through declarative self-improving prompt pipelines and strict schema constraints for structured JSON generation.
About AI Token Estimator & LLM API Cost Calculator
Estimate token usage, context window limits, and API generation costs across modern frontier LLMs including OpenAI GPT-4o, Claude 3.7 Sonnet, DeepSeek-R1, and Meta Llama 3. Calculations run locally using standard subword heuristics and verified model pricing tables.
Frequently Asked Questions (FAQ)
Is this tool safe for processing sensitive or confidential tokens?
Yes. All operations execute 100% locally via in-browser JavaScript without dispatching data to external servers (Zero Telemetry & Zero Logging).
Does this utility support keyboard shortcuts?
Yes. You can press Enter to trigger execution and use the Reset button to instantly clear input fields.
Does this tool work completely offline?
Yes. All scripts and stylesheets are cached locally via our Service Worker, providing complete offline capability.
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