Claude API Cost Estimator
Estimate your Anthropic Claude API costs and optimize with prompt caching savings.
Percentage of input prompt containing long static instructions, PDF uploads, or codebases that are reused.
How often the cached prompt is updated. Less frequent writes result in higher cache hit rates and lower costs.
What is the Claude API Cost Estimator?
The Claude API Cost Estimator helps developers, teams, and software architects project their monthly billing for Anthropic's Claude 3.5 Sonnet, Claude 3.5 Haiku, and Claude 3 Opus models. Since Anthropic offers Prompt Caching (which cuts input token costs by up to 90%), this calculator lets you simulate your prompt reuse patterns and cash-in on caching discounts to see your true optimized API spend.
How Does the Claude API Cost Estimator Work?
1. Select Claude Model â Choose Claude 3.5 Sonnet, Claude 3.5 Haiku, or Claude 3 Opus.
2. Set Request Volume â Input expected monthly API requests.
3. Specify Token Counts â Define your average prompt length (input tokens) and response length (output tokens).
4. Enter Cache Settings â Toggle what percentage of your prompt context is cached and specify how frequently the cache is refreshed/written.
5. Analyze Savings â View your total monthly bill with and without caching, along with net dollar and percentage savings.
Formula & Calculation Method
Standard Pricing Rates (per million tokens):
- Claude 3.5 Sonnet: Input: $3.00 | Output: $15.00 | Cache Read: $0.30 | Cache Write: $3.75
- Claude 3.5 Haiku: Input: $0.80 | Output: $4.00 | Cache Read: $0.08 | Cache Write: $1.00
- Claude 3 Opus: Input: $15.00 | Output: $75.00 | Cache Read: $1.50 | Cache Write: $18.75
Equations:
- Standard Input Cost: (Prompt Tokens / 1,000,000) à Standard Input Rate à Requests
- Cached Read Cost: (Cached Tokens / 1,000,000) à Cache Read Rate à (Requests - Cache Writes)
- Cached Write Cost: (Cached Tokens / 1,000,000) à Cache Write Rate à Cache Writes
- Total Cost with Caching: Uncached Input Cost + Cached Read Cost + Cached Write Cost + Output Cost
Example Calculation
Example: App making 5,000 requests to Claude 3.5 Sonnet, 10,000 input tokens (70% cached), 1,000 output tokens. Cache written once every 10 requests.
- Without Caching:
- Input Cost = (10,000 / 1M) Ã $3.00 Ã 5,000 = $150
- Output Cost = (1,000 / 1M) Ã $15.00 Ã 5,000 = $75
- Total Cost: $225 / month
- With Prompt Caching:
- Cached Tokens = 7,000 | Uncached = 3,000
- Uncached Cost = (3,000 / 1M) Ã $3.00 Ã 5,000 = $45
- Cache Writes = 5,000 / 10 = 500 writes
- Cache Write Cost = (7,000 / 1M) Ã $3.75 Ã 500 = $13.13
- Cache Reads = 5,000 - 500 = 4,500 reads
- Cache Read Cost = (7,000 / 1M) Ã $0.30 Ã 4,500 = $9.45
- Total Cost with Caching: $45 (uncached) + $13.13 (writes) + $9.45 (reads) + $75 (outputs) = $142.58
- Net Savings: $82.42 (36.6% saved)!
Frequently Asked Questions
**Standard Pricing Rates (per million tokens):** - **Claude 3.5 Sonnet:** Input: $3.00 | Output: $15.00 | Cache Read: $0.30 | Cache Write: $3.75 - **Claude 3.5 Haiku:** Input: $0.80 | Output: $4.00 | Cache Read: $0.08 | Cache Write: $1.00 - **Claude 3 Opus:** Input: $15.00 | Output: $75.00 | Cache Read: $1.50 | Cache Write: $18.75 **Equations:** - **Standard Input Cost:** (Prompt Tokens / 1,000,000) à Standard Input Rate à Requests - **Cached Read Cost:** (Cached Tokens / 1,000,000) à Cache Read Rate à (Requests - Cache Writes) - **Cached Write Cost:** (Cached Tokens / 1,000,000) à Cache Write Rate à Cache Writes - **Total Cost with Caching:** Uncached Input Cost + Cached Read Cost + Cached Write Cost + Output Cost
Disclaimer: This tool is provided for informational and calculation purposes. Output values are estimates based on standard user inputs.