AI API Rate Limit Calculator
Enter your expected traffic. See which providers can handle it — and what it'll cost.
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How to Handle Rate Limits
Request Queuing
Add a queue layer (BullMQ, AWS SQS) to buffer requests when you hit RPM limits. Smooths out traffic spikes without losing requests.
Multi-Key Rotation
Use multiple API keys and rotate between them. Effectively multiplies your RPM limit. Common pattern for high-throughput apps.
Model Routing
Route simple requests to high-RPM budget models (Gemini Flash: 4K RPM) and complex requests to flagships. Reduces load on expensive endpoints.
Batch API
For non-urgent workloads, use Batch APIs (OpenAI, Anthropic). They have separate, higher rate limits AND cost 50% less.
Exponential Backoff
When you get a 429 error, wait and retry with exponential backoff (1s, 2s, 4s, 8s). Most SDKs handle this automatically.
Response Caching
Cache identical or similar responses. Reduces API calls by 20-40% for chatbot workloads with repeated queries.
Calculate Your Full Monthly Cost
Rate limits are just one factor. See the complete picture — cost per request, monthly spend, and savings opportunities across all 88 models.
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