ChatGPT API
1007msTypical
The fastest of the three, and about the same from every test location.
Full breakdownFind where your site or API is slow, anywhere in the world
Response times from 6 locations worldwide. Free, no account.
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Fast to run
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Global view
See how your app performs across Europe, America, and Asia
Compare against real services
See how your API performs next to GitHub, Cloudflare, OpenAI, and more
How fast do AI providers respond, worldwide?
We measure how long the first word takes to arrive, every day, from five test locations. Each number below is the typical time across all five.
Claude API
1447msTypical
Around 0.4 seconds behind ChatGPT, and just as steady everywhere.
Full breakdown
Grok API
2572msTypical
About 2.6 times ChatGPT's wait, almost all of it the model rather than the network.
Full breakdownFrom the Learn section
Short takes on latency tradeoffs that matter when you need to ship, not read a textbook.
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Is 340 ms slow?
It depends on what you measured and where the request started.
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How to test your API latency from multiple regions without setting up infrastructure
Your laptop says the API is fast. Your users on the other side of the world are telling you something else.
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TTFB: the number that determines whether Google can rank your site
You've probably never measured it. It's probably the biggest performance problem you have.