Bedrock Abacus

A TypeScript utility for calculating token counts and pricing for Amazon Bedrock models.

Note: Pricing is as of 2025-03-19

Features

• Calculate token counts for text input
• Calculate pricing for Amazon Bedrock models
• Support for both standard and batch pricing
• Support for popular models including:
  • Claude 3.* Sonnet
  • Claude 3.6 Haiku
  • Claude 3 Opus
  • Llama3.3 70B
  • Llama3.2 11B
  • Amazon Nova Pro and Lite

Installation

You can use Bedrock Abacus directly in your project:

import { calculate, countTokens, MODELS } from "bedrock-abacus";

Usage

Calculating Token Count and Pricing

import { calculate, countTokens, MODELS } from "bedrock-abacus";

// Calculate pricing based on text
const result = calculate({
	text: "You picked the right time but the wrong guy.",
	options: {
		modelId: MODELS["Claude 3.5 Sonnet"],
		batch: false,
	},
});

console.log(`Token count: ${result.tokenCount}`);
console.log(`Input cost: $${result.pricing.pricing.input.toFixed(6)}`);
console.log(`Output cost: $${result.pricing.pricing.output.toFixed(6)}`);

// Or calculate pricing based on token count
const result2 = calculate({
	tokenCount: 1000,
	options: {
		modelId: MODELS["Llama3.3 70B"],
		batch: true,
	},
});

Get Token Count Only

import { countTokens } from "bedrock-abacus";

const count = countTokens("Scorekeeper, deduct one life.");
console.log(`Token count: ${count}`);

Available Models

The library includes all current Amazon Bedrock models with their IDs and pricing:

import { MODELS, PRICING } from "bedrock-abacus";

// Access model IDs
console.log(MODELS["Claude 3.5 Sonnet"]);

// Access pricing
const pricingInfo = PRICING["Claude 3.5 Sonnet"];
console.log(`Standard input: $${pricingInfo.standard.input} per 1K tokens`);
console.log(`Standard output: $${pricingInfo.standard.output} per 1K tokens`);

Development

# Run the development server
deno task dev

# Run tests
deno test

License

MIT

Contributing

Contributions are welcome! Plz help