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OpenAI API vs Perplexity AI API

Same instrument, two spec sheets — measured, not claimed.

APIOpenAI APIDEAD0Perplexity AI APIDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitRetry-After: 109sUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenAI API vs Perplexity AI API: common questions

Which is more reliable, OpenAI API or Perplexity AI API?

Both are neck-and-neck — OpenAI API and Perplexity AI API each measure 0.0% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Do OpenAI API and Perplexity AI API need an API key?

Both ask you to authenticate — OpenAI API uses an API key and Perplexity AI API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call OpenAI API and Perplexity AI API from the browser?

Yes — both OpenAI API and Perplexity AI API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are OpenAI API and Perplexity AI API free for commercial use?

OpenAI API has unclear commercial terms, and Perplexity AI API has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.