Claude API Cost Estimator
ClaudeAIHub.
Use this calculator to estimate Claude API costs before you build. Enter your expected token volumes and request count to get a rough cost estimate. This is a starting point — real bills depend on your actual usage patterns, caching strategy, and Anthropic’s current pricing.
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Enter your expected input and output token volumes by model to estimate monthly Claude API costs. Useful for budget planning before scaling a Claude-powered application. Estimates are based on current published pricing and do not include discounts or caching savings.
| Item | Tokens | Estimated Cost |
|---|
Understanding the Estimate
App Plans vs API Billing
Claude app plans (Free, Pro, Max, Team) give you a usage-based subscription for claude.ai and the desktop app. The Claude API is billed separately on a pay-per-token model — you pay for exactly what you use, with no subscription. Many developers use the app for personal work and the API for products they are building.
What is a Token?
Tokens are the units Claude uses to measure text. Roughly, 1 token ≈ 0.75 English words, or 4 characters. A 1,000-word document is approximately 1,300–1,500 tokens. Both your input (prompt + context) and Claude’s output are counted separately.
| Text | Approximate tokens |
|---|---|
| One sentence (~10 words) | ~13 tokens |
| Short paragraph (~100 words) | ~130 tokens |
| One page (~500 words) | ~650 tokens |
| Short article (~1,500 words) | ~2,000 tokens |
| Long document (~10,000 words) | ~13,000 tokens |
Why Real Bills May Differ
- Prompt caching: If you use prompt caching for repeated context, cache reads cost 90% less than standard input tokens. Cache writes cost slightly more. The calculator includes a basic cache read estimate but not cache write costs.
- Batch API discount: The Message Batches API offers reduced pricing for asynchronous batch requests. Not included in this estimate.
- Enterprise rates: Organizations with enterprise agreements may have different pricing. Check with Anthropic directly.
- Pricing changes: Anthropic updates its pricing over time. This tool uses prices at the time it was last updated — verify at platform.claude.com/docs/en/about-claude/pricing.
Current API Pricing (at time of writing)
| Model | Input ($/MTok) | Output ($/MTok) | Context |
|---|---|---|---|
| Claude Opus 4.7 | $5 | $25 | 1M tokens |
| Claude Sonnet 4.6 | $3 | $15 | 1M tokens |
| Claude Haiku 4.5 | $1 | $5 | 200k tokens |
Always verify prices at platform.claude.com/docs/en/about-claude/pricing before making budget decisions.
Cost Optimization Tips
- Use the right model: Haiku 4.5 is 5× cheaper than Sonnet 4.6 for input and output. Many simple tasks don’t require Opus-level capability.
- Use prompt caching: If your system prompt or document context is reused across many requests, prompt caching can reduce input costs by up to 90% on cache reads.
- Minimize output length: Output tokens cost 5× more than input tokens per unit. Ask Claude for concise responses when you don’t need long outputs.
- Use the Batch API: The Message Batches API offers reduced pricing for workloads that don’t need real-time responses.
- Test before scaling: Run a small pilot at your actual token volumes before committing to a large workload.
Related Resources
- Claude API Guide for Developers — getting started with the API
- Claude API Key Guide — creating and securing your API key
- Claude Models Explained — Opus vs Sonnet vs Haiku comparison
- Claude Prompt Caching Guide — reduce costs on repeated context
- Claude Model Selector — find the right model for your use case
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