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Anthropic API Budgeting

Claude Cost Calculator

Forecast Claude Sonnet, Opus, and Haiku spend for research agents, coding assistants, and document workflows.

Estimate Claude API costs for Anthropic models using token usage and request volume. Compare Claude Sonnet and Opus monthly AI costs. Everything runs as a static browser tool with no login, database, or AI API call.

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Use the tool

Claude planning

Estimate Claude token spend

Forecast Claude Sonnet, Opus, and Haiku API costs for research agents, coding assistants, and document-heavy workflows.

Anthropic model

Input tokensOutput tokensDaily requests

Estimated Anthropic spend

Claude Sonnet

Input $3.00 / 1M tokens · Output $15.00 / 1M tokens

Plan for coding assistants, research agents, and document workflows.

Per day

$18.00

Per month

$540

Per year

$6,570

Per 1k requests

$36.00

Formula: ((input tokens × input price) + (output tokens × output price)) ÷ 1,000,000 × daily requests. Monthly estimates use 30 days.

Compare Anthropic model costs

Based on your token and request assumptions above. Verify current provider pricing before production budgeting.

Model	Input price	Output price	Monthly estimate
Claude Sonnet	$3.00 / 1M	$15.00 / 1M	$540
Claude Opus	$15.00 / 1M	$75.00 / 1M	$2,700
Claude Haiku	$0.80 / 1M	$4.00 / 1M	$144

Estimate Claude API spend across Sonnet, Opus, and Haiku-style models

Compare monthly cost for document-heavy workflows

Plan high-reasoning workloads without calling the Anthropic API

Use cases

Research agents and document analysis

Coding assistants with long context

Knowledge-base workflows

Reasoning-heavy product features

Best practices

Summarize long documents before follow-up calls.

Use Opus-class models only for the hardest tasks.

Set output limits for analysis-heavy prompts.

FAQ

What is a Claude cost calculator?

A Claude cost calculator estimates Anthropic API spend from token usage, selected Claude model, and request volume.

How are Claude API costs calculated?

Claude costs are estimated from input tokens plus output tokens multiplied by each model price per one million tokens.

What is the difference between Claude Sonnet and Opus cost?

Sonnet is usually the balanced production option. Opus-class models cost more and should be reserved for harder reasoning tasks.

Why can Claude costs increase quickly?

Long documents and long generated answers can create high input and output token volume, especially with expensive models.

Does this tool use the Anthropic API?

No. The calculator runs locally in your browser and does not call Anthropic or require a Claude API key.

How can I reduce Claude token usage?

Chunk documents, summarize context, cache repeated analysis, cap output length, and route lightweight tasks to lower-cost models.