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Rate-Limit Burst Hit Predictor

Will your traffic spike hit the RPM ceiling?

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Learn more — how it works, FAQ & guide
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LLM Rate-Limit Burst Predictor

Will Friday-noon traffic spike crash your LLM API? This tool predicts whether your peak RPM and TPM will exceed provider limits, and recommends a mitigation strategy.

How to use this tool

  1. 1

    Set average traffic

    Average requests per minute (RPM).

  2. 2

    Set peak multiplier

    How spiky is traffic? 3× during peak hour is common.

  3. 3

    See hit probability

    Will you cross the provider RPM ceiling?

Frequently Asked Questions

What are typical LLM rate limits?
Anthropic Tier 1: 50 RPM Opus, 1000 RPM Haiku. OpenAI Tier 1: 500 RPM. Tier 4 / Enterprise can be 10K+ RPM. Provider dashboards show your exact limits.
How do I survive a burst?
Three strategies: (1) round-robin between API keys / providers, (2) queue requests with exponential backoff, (3) cache top queries to dodge LLM entirely.
TPM vs RPM?
Tokens-per-minute usually hits before RPM. A 200K-token request burns the TPM budget instantly even at 1 RPM. Most production hits are TPM, not RPM.

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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.