Monthly API Budget Calculator
Enter your monthly budget and average request size to find out exactly how many LLM API calls you can afford per day and per month.
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Monthly API Budget Calculator — Plan Your LLM Spending
This calculator helps startups, developers, and enterprises estimate how many API calls they can make with a given monthly AI budget. Enter your budget, select a model, and specify your average prompt and completion lengths to get instant breakdowns.
Tips to Maximize Your LLM Budget
- Choose the right model tier — GPT-4o-mini costs 16× less than GPT-4o with comparable quality for many tasks.
- Shorten output tokens — Output tokens cost 3–5× more than input tokens on most APIs.
- Use streaming — Streaming doesn't reduce cost but prevents timeout issues that waste tokens.
- Cache repeated prompts — OpenAI and Anthropic both offer significant discounts for cached input tokens.
- Use DeepSeek for cost-sensitive workloads — DeepSeek V3 delivers GPT-4o quality at ~90% lower cost.
- Batch API — OpenAI and Anthropic offer 50% discounts for non-real-time batch processing.
Example Monthly Budgets
- $10/month with GPT-4o-mini: ~55,000 requests (500 in / 200 out tokens each)
- $100/month with Claude Sonnet: ~17,000 requests (500 in / 200 out tokens each)
- $100/month with DeepSeek V3: ~250,000 requests (500 in / 200 out tokens each)
- $500/month with GPT-4o: ~55,000 requests (500 in / 200 out tokens each)
Related Tools
- Token Cost Converter — enter a token count directly and see USD cost per model
- Prompt vs Completion Cost Split — analyze the balance of input vs output costs
- Fine-Tuning Cost Calculator — estimate how long until fine-tuning pays off vs prompt engineering
- Multi-Model Cost Comparison — compare all major LLMs side-by-side